Help identify odd Old frame unmarked Luger

[Fusil Finland]

I need help to identify a old frame Luger with odd features. Pistol have only serial number 10055 B and L-shape figure in the rear part of the toggle.

The toggle knobs are in the mid-part.

Unfortunately the barrel was replaced with Finnish Tikkakoski 7,65mm barrel and the upper frame was shorten a bit to fit the barrel. Maybe there was a long barrel and the pistol did not fit the Finnish holster.

Long time ago I owned very much similar 10007 B but I don´t have any pictures left of it to compare.

[Fusil Finland]

I add some pictures of internal numbers etc.

[Fusil Finland]

and more pictures

[Fusil Finland]

Internal numbers 56 and 3

[ithacaartist]

Welcome to the forum, Janne.

Your pistol is interesting, in part due to its strangeness and aspects that would seem to contradict themselves--or at least what one would generally expect to see.

This is indeed a "long frame" gun, and the barrel is, of course, not original to its extension. The "GL" monogram on the rear toggle link was ordinarily applied to prototypes associated with Georg Luger's involvement. The toggle links are definitely the old school arrangement. The breech block sports a hole on the bottom to allow for gas venting in the event of as pierced primer, which is a "Scandinavian feature". If the barrel extension has been shortened to fit the barrel, it is a shame. The use of a coiled recoil spring instead of a leaf spring is notable. The bell crank in the frame needs to be of the type to specifically accommodate a coil spring and its guide, and the frame and upper combo are compatible in this way, despite their serialization's single digit difference. There is, however, a blue "heat stain" on the frame in the area in which this arrangement would be found, and a matching burn mark on the corresponding area on the back of the right grip. This would indicate that some welding has been going on, perhaps to adapt an old model frame to a coil spring recoil system. The replacement barrel's flange has also been messed with, because there's not much of it remaining. The "B" suffix would seem to relate it to this variation (https://phoenixinvestmentarms.com/2146ProtoFBGL02.html)

Let's see what others may add as observations or explanations about this pistol. The GL monogram, if original, is certainly intriguing.