Wanting help understanding or identifying model 38 Calvary Carbine ? no mum

I have a Short Arisaka Carbine which I believe to be a 38 Calvary Carbine probably sporterised overseas but if so in the 1930's or 40's and with a very odd history that defies reasonable explanation. The rifle does not have nor does it ever look to have had a Mum on the upper receiver. All of the metal parts seem to be intact although heavily engraved. Their is a deer head inlayed in the upper receiver with extensive engraved scrollwork on all parts of the receiver, tang trigger guard and magazine floorplate. This rifle was brought home by a US soldier who acquired it in a second hand or pawn type store in Nuremburg Germany late 1945 while in the army of the Occupation. The rifle was already engraved when acquired but had not been tapped for scope mounts. A family member thinking to use the carbine as a hunting weapon had the receiver tapped for weaver bases in the mid 1950's. Due to ammunition issues in 60's and 70's the carbine fell in disuse and the scope and bases were removed and the weapon remained in the gun rack until around 2010 or so when it was given to me. I put it in the rack and forgot about it as a sporterised military rifle (ho hum) until recently when I began working a trade for a Arisaka training or school rifle with a individual who is far more knowledgeable on Arisakas than I. When I mentioned the old carbine the Arisaka guy wanted to see it and when he did he got all excited and started to make offers in the $500.00 range. That got me curious and I started to do my own research and now am asking for the assistance of other collectors or potential Arisaka experts. I understand some Arisaka Carbines went to various locations in Europe prior to WWII and it is my belief that is the origin of my carbine. Please view my pics and provide info or opinion if you will..I have a Short Arisaka Carbine which I believe to be a 38 Calvary Carbine probably sporterised overseas but if so in the 1930's or 40's and with a very odd history that defies reasonable explanation. The rifle does not have nor does it ever look to have had a Mum on the upper receiver. All of the metal parts seem to be intact although heavily engraved. Their is a deer head inlayed in the upper receiver with extensive engraved scrollwork on all parts of the receiver, tang trigger guard and magazine floorplate. This rifle was brought home by a US soldier who acquired it in a second hand or pawn type store in Nuremburg Germany late 1945 while in the army of the Occupation. The rifle was already engraved when acquired but had not been tapped for scope mounts. A family member thinking to use the carbine as a hunting weapon had the receiver tapped for weaver bases in the mid 1950's. Due to ammunition issues in 60's and 70's the carbine fell in disuse and the scope and bases were removed and the weapon remained in the gun rack until around 2010 or so when it was given to me. I put it in the rack and forgot about it as a sporterised military rifle (ho hum) until recently when I began working a trade for a Arisaka training or school rifle with a individual who is far more knowledgeable on Arisakas than I. When I mentioned the old carbine the Arisaka guy wanted to see it and when he did he got all excited and started to make offers in the $500.00 range. That got me curious and I started to do my own research and now am asking for the assistance of other collectors or potential Arisaka experts. I understand some Arisaka Carbines went to various locations in Europe prior to WWII and it is my belief that is the origin of my carbine. Please view my pics and provide info or opinion if you will..I have a Short Arisaka Carbine which I believe to be a 38 Calvary Carbine probably sporterised overseas but if so in the 1930's or 40's and with a very odd history that defies reasonable explanation. The rifle does not have nor does it ever look to have had a Mum on the upper receiver. All of the metal parts seem to be intact although heavily engraved. Their is a deer head inlayed in the upper receiver with extensive engraved scrollwork on all parts of the receiver, tang trigger guard and magazine floorplate. This rifle was brought home by a US soldier who acquired it in a second hand or pawn type store in Nuremburg Germany late 1945 while in the army of the Occupation. The rifle was already engraved when acquired but had not been tapped for scope mounts. A family member thinking to use the carbine as a hunting weapon had the receiver tapped for weaver bases in the mid 1950's. Due to ammunition issues in 60's and 70's the carbine fell in disuse and the scope and bases were removed and the weapon remained in the gun rack until around 2010 or so when it was given to me. I put it in the rack and forgot about it as a sporterised military rifle (ho hum) until recently when I began working a trade for a Arisaka training or school rifle with a individual who is far more knowledgeable on Arisakas than I. When I mentioned the old carbine the Arisaka guy wanted to see it and when he did he got all excited and started to make offers in the $500.00 range. That got me curious and I started to do my own research and now am asking for the assistance of other collectors or potential Arisaka experts. I understand some Arisaka Carbines went to various locations in Europe prior to WWII and it is my belief that is the origin of my carbine. Please view my pics and provide info or opinion if you will..I have a Short Arisaka Carbine which I believe to be a 38 Calvary Carbine probably sporterised overseas but if so in the 1930's or 40's and with a very odd history that defies reasonable explanation. The rifle does not have nor does it ever look to have had a Mum on the upper receiver. All of the metal parts seem to be intact although heavily engraved. Their is a deer head inlayed in the upper receiver with extensive engraved scrollwork on all parts of the receiver, tang trigger guard and magazine floorplate. This rifle was brought home by a US soldier who acquired it in a second hand or pawn type store in Nuremburg Germany late 1945 while in the army of the Occupation. The rifle was already engraved when acquired but had not been tapped for scope mounts. A family member thinking to use the carbine as a hunting weapon had the receiver tapped for weaver bases in the mid 1950's. Due to ammunition issues in 60's and 70's the carbine fell in disuse and the scope and bases were removed and the weapon remained in the gun rack until around 2010 or so when it was given to me. I put it in the rack and forgot about it as a sporterised military rifle (ho hum) until recently when I began working a trade for a Arisaka training or school rifle with a individual who is far more knowledgeable on Arisakas than I. When I mentioned the old carbine the Arisaka guy wanted to see it and when he did he got all excited and started to make offers in the $500.00 range. That got me curious and I started to do my own research and now am asking for the assistance of other collectors or potential Arisaka experts. I understand some Arisaka Carbines went to various locations in Europe prior to WWII and it is my belief that is the origin of my carbine. Please view my pics and provide info or opinion if you will..I have a Short Arisaka Carbine which I believe to be a 38 Calvary Carbine probably sporterised overseas but if so in the 1930's or 40's and with a very odd history that defies reasonable explanation. The rifle does not have nor does it ever look to have had a Mum on the upper receiver. All of the metal parts seem to be intact although heavily engraved. Their is a deer head inlayed in the upper receiver with extensive engraved scrollwork on all parts of the receiver, tang trigger guard and magazine floorplate. This rifle was brought home by a US soldier who acquired it in a second hand or pawn type store in Nuremburg Germany late 1945 while in the army of the Occupation. The rifle was already engraved when acquired but had not been tapped for scope mounts. A family member thinking to use the carbine as a hunting weapon had the receiver tapped for weaver bases in the mid 1950's. Due to ammunition issues in 60's and 70's the carbine fell in disuse and the scope and bases were removed and the weapon remained in the gun rack until around 2010 or so when it was given to me. I put it in the rack and forgot about it as a sporterised military rifle (ho hum) until recently when I began working a trade for a Arisaka training or school rifle with a individual who is far more knowledgeable on Arisakas than I. When I mentioned the old carbine the Arisaka guy wanted to see it and when he did he got all excited and started to make offers in the $500.00 range. That got me curious and I started to do my own research and now am asking for the assistance of other collectors or potential Arisaka experts. I understand some Arisaka Carbines went to various locations in Europe prior to WWII and it is my belief that is the origin of my carbine. Please view my pics and provide info or opinion if you will..