The holster appears to be the Model 1912 holster. Does it have the swivel and drop on the backside that can't be seen in the photograph?
Also the lanyard loop magazine appears to be the early type issued only in 1912. The non lanyard loop magazine is the type that would have been originally shipped with the pistol.
A real treasure knowing where it came from. Is the serial number No.142720? With the serial number I can tell you where it was originally shipped.
How about a close-up shot of the lanyard loop magazine?