They both appear to be variants of the Weihrauch Rekord trigger. They look like early versions that have a thread for the rear screw cut into the metal frame rather than the later type that have a separate nut slid into the frame.
They are pretty much interchangeable throughout the Weihrauch models so there is a market for them.
I bought one a while back to replace the cheaper pressed steel Perfekt trigger unit fitted into my wife's HW50 mk2. The Rekord is adjustable and a superior unit and is fitted to the S models of the HW50 and HW99.
I think I paid around £30.00 - £40.00 for the used unit that I bought.
Hope that helps!