Nothing too identifiable about the trigger blade, but the selector is a sliding button mounted at the junction of the wood and metal of the top tang on the left side. It resembles a miniature safety slide. Don't know much more about the company, but the ones I have work OK, so far. There have been discussions about this trigger on this site and/or on the PGCA site. One of the PGCA members owns a gun that is pictured in the 1914 Lancaster brochure and another member owns a gun that was mentioned in a testimonial in the same brochure. What are the chances?
