galamb said:
This looks like a "mongrel" that someone put together while learning how to build.
It isn't horrible, but there is evidence that their inletting skills were not developed or they weren't careful (note the marks where the x-acto knife slipped in your close-up pic of the escutcheon at the barrel pin - the escutcheon by the way is die cut (probably done by Ted Cash and available from many current suppliers).
The tang appears as it would have come from the supplier - doesn't look shaped in any way.
Based on what I can see of the trigger guard and the comb line it looks like the builder might have been going for a "Lehigh" style.
A better picture of the lock may lead to an identification of the lock mfg.
If you drift out the barrel pins, remove the tang screw and pull the barrel there may be makers marks on the bottom (from the barrel maker).
If this was built by a noted "modern" builder it certainly was done in their "apprentice" phase. You will probably never be able to nail down who built it, but you may be able to learn who made the barrel, lock and possibly trigger giving you some idea of the quality of the parts used.
Guess the same incompetent apprentice built this one from 2008, it appears the same, either that or the first responder is correct
Lock is a Maslam(?), fairly common I think:
http://www.gunauction.com/search/displayitem.cfm?itemnum=[/quote]
Some images of the 2008 gun I found that appears the same: