IBM serial #3,849,505
Would a Type III slide have been used this late?
Or would a Type IV be correct?
Estimated date of Jan-Feb 1944.
TIA,
Charlie-painter777
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IBM serial #3,849,505
Would a Type III slide have been used this late?
Or would a Type IV be correct?
Estimated date of Jan-Feb 1944.
TIA,
Charlie-painter777
Hey Charlie, Riesch says type IV after 3,775,000, does that sound right? My project is serial #3,884,965-35,460 later than yours. Do you know how many they were turning out per week? Lets see what other think on the slide.....Frank
Riesch's book has led so many new collectors astray. The type 4 slide was first in the 3.7 range but didn't become more commonly used than the the type 3 until late in the 3.9 million serial number range. The type 3 and type 4 were used side by side through much of IBM production. The simplistic concept that once the first type 4 slide was used, no more type 3 type slides were used is simply wrong. The type 3 slide is much more common than the type 4 AOB (IBM) slide. Go out looking for IBM slides and you will find 5 or 10 times more type 3 IBM slides than type 4 IBM slides. If IBM really did complete switch to only type 4 slides at exactly 3,775,000 you find the opposite and find more type 4 IBM slides than type 3 IBM slides. Unless you are restoring a very late IBM (later than 3.95 million) don't get sressed out trying to find a type 4 slide.
Thanks Mike,
I've been looking and just like your saying tons of type III slides can be had..........Very few type IV.
Regards,
Charlie
Mike, thanks I'll be getting a type 3, based on your observation.:thup:
I know that there was alot of mix going on, and I did leave what it said in Riesh, open for discussion;).....Frank:cheers:
There is a very simple reason why you will find many more type 3 IBM slides as opposed to type 4 IBM slides and that is that IBM used many more type 3 slides. It is not that the collectors have snatched up all the type 4 IBM slides.
I would look for a type 3 AOB marked slide that matches well in terms of color and wear for your 3849505 or 3884965. You will have an easier time finding the slide, you will more likely be able to come up with a slide that matches your receiver color / wear, and you are more likely to have the type of slide that your carbine originally was assembled with.
Happy hunting.
Noticed many IBM round bolts vs few flat bolts.
Maybe same situation?
tia,
Charlie
FrankD,
I've been told my IBM 3,849,505 was made in late Jan-Early Feb 1944.
Was also told by a fellow member that IBM was making about 40,000 carbines for each of these months.
Guessing if yours is 35,460 later.....It may very well be late Feb (?) 1944.
HTH,
Charlie
Charlie,
Again you are lucky, the most likely bolt for your IBM carbine is the one most commonly encountered, the round AOB marked bolt. IBM got into the carbine game fairly late so the round bolt was introduced fairly early in their production, somewhere in the 3.7 million range. By the time of your 3.849 million IBM had pretty much switched to only round bolts.
Does anyone have any data on when the 'EM-B' round bolt would have appeared in IBM ? About same as 'AOB'? Thanks.
I have #3955066. It has a type 3. A friend bought it from an OLD gentleman in the mid 90's. He claimed his Seabee group stole it and everything not nailed down out of the LSTs arms locker the night before they landed on an island of contested real estate after being issued their " defensive armament " for the duration , a .45 M1911 and 3 loaded clips each. He claimed to have never fired it in anger , but it did give comfort 2 or 3 times. He kept it all this time , but didn't have anyone in his family to leave it to that he'd know would take care of it. It has been taken care of an looks to be almost factory new and orig. , easily in the top two of all the carbines in my collection.
The type 3 did bother me a lot , but , man , it just looked right. The lastest indications are that some of IBMs subcontractors might NEVER had upgraded to the type IV.
Chris
Charlie I have 3857121 and it has a type 3 slide believed orignal as mfgd. to the carbine. hth.
Carbine club newsletter says EM-B bolt (Endicott Machine co.) shows up sporadically from 3881xxx > 3953620. 85% of IBM carbines had either flat or round AOB bolts. There was a transitional period from 3744xxx > 3849xxx where both flat and round bolts were used (AOB).
IBM did not start using the round bolt until early 1944. In January 1944 AO had a problem with their bolts and as a result 16000 bolts were rejected. It was not until Feb. that 12,000 bolts made by Union Switch & Signal arrived to help with IBM's bolt shortage. AO was told not to heat treat the bolts they made and heat treatment was done at the IBM #4 plant in the beginning of Feb. AO,Union,Endicott and Standard Computing in that order made the type 3 bolts for IBM.
When was the round bolt design standardized?
The Club newsletter indicates round bolts standard somewhere after serial 3849xxx
It was before that, as the NL indicates.
Hi Charlie, well I have to admit your slide question got me curious about my IBM so for the first time in over a year I took apart the IBM to see which slide was in mine. Turns out that I have a type 3 marked AOB with a "G" stamped about one inch above the AOB. Anyways, I figured it was about time to oil the metal while I had it apart. I imagine I should oil the other carbines as well :cool:
Hey Mike, you have to get 'em out and stroke 'em every now and again. :)Quote:
Originally Posted by Magnum Mikie