Background

Barrel Group

Barrel	type I	I.B.M. Corp. (no date)
Front Sight	type II	PO B (Prestole Division Detroit Harvester Co. for IBM)
Barrel Band	type II	\  (IBM)
Barrel Skirt		short
Slide	type III	SG (Saginaw Gear of Saginaw, MI)

Last 3 digits of receiver serial number etched outside on left of slide. No import mark anywhere on the barrel, or elsewhere. P proofmark on top of barrel midway between front sight and barrel band.

Stock Group

Stock	type III	OI (Overton for Inland)
Handguard	type I	RMC (Rock-Ola)
Buttplate		S-S3 (Standard Products)

Handguard has 389654 stamped on bottom, having omitted the 9 of 954. Stock has what appears to be the same 6 digits very lightly stamped inside the forearm. The digits are not clear enough to identify beyond doubt.

Receiver Group

Receiver	type I	I.B.M. Corp.
Rear Sight	type III	I.R.CO. (International Register Co.)
Recoil Plate	type III	AU (Underwood)

Top of receiver to left of bolt stamped "Bavaria Municipal Police". Last 3 digits of receiver serial number etched on bottom of recoil plate.

Bolt Group

Bolt	type II	SG (Saginaw Gear of Saginaw, MI)
Ejector	type III
Extractor	type III	W.I. (Wadsworth Watchcase Co. of Dayton, KY for Inland)
Extractor Plunger	type II
Firing Pin	type I	SG (Saginaw Gear of Saginaw, MI)

Last 3 digits of receiver serial number lightly etched in top of bolt.

Trigger Group

Trigger Housing	type IV	ST (Standard Products)
Trigger	type II	F.I. (Inland)
Sear	type I	SW (White Sewing Machine Co. of Cleveland, OH for Standard Products)
Hammer	type III	SW (White Sewing Machine Co. of Cleveland, OH for Standard Products)
Hammer Spring	type II
Trigger Housing Pin	type II
Safety	type III	unmarked
Magazine Catch	type III	EI (Eaton Pond Co. of Springfield, MA for Inland)

Last 3 digits of receiver serial number etched into left side of trigger housing adjacent magazine well. Trigger has the number 8372 stamped on the outside left.