Got an Erfurt in for restoration and I am not completely sure what it is but I would call it a 9mm Erfurt Commercial Alphabet Luger. It has the following markings and description. Fully matched parts.
Barrel-Matching SN to frame and receiver, it has the SN and barrel guage on bottom chamber end. It has a gothic letter and Crown over RC on the Top barrel, chamber end at 10 oclock position, it has an Erfurt proof eagle on same end, 1:30 positiion. Barrel witness is slightly different angle and strike from frame but aligned pretty good. Barrel is 9mm and only 3 &7/8" in length, muzzle to breechface.
Receiver-Erfurt cut on top, NO chamber markings, 4 digit SN in military style on left receiver front, NO Crown N proof. Is does NOT have any Acceptance stamps or proofs on right receiver front. Crown over gothic letter on ejector. Top of receiver has
mill markings remaining on top of forks and top rear so it looks like an Erfurt receiver.
Extractor-matched number and crown over gothic letter
Breechblock-Erfurt eagle proofed with matching number left side.
Sideplate-Matched with crown over gothic letter.
Front toggle link-Crown over Erfurt, very light logo strike, matched number with crown over gothic letter on top.
Rear toggle link-matched number with crown over RC on top.
Frame-Gothic Letter under a crown at several locations, SN in the "p" block.
Remaining number parts match, including HO. Firing pin is WWI style with one light vent groove cut in it. This is not a WWII firing pin. No number on pin.
Things that are confusing to me for a military gun.
Why no 4" barrel, probably a Versailles requirment?
Why no acceptance markings on right receiver?
Things confusing about a Commercial gun for me.
Why no Crown over N
Most Alphabet Lugers are Crown N proofed.
Most are 30 Luger
Most are DWM
Just a puzzlement.
color me Corn......fused!
