I dont know if the rekodr trigger blade would fit a perfekt unit? i think they work differently?
I've had a couple of weihrauchs that have been imported by other companies or so i presume as there's no hull cartridge stamp on the barrel?
just get a modern HW80 or HW95 Rekord trigger block for whatever gun you are toying with the idea of swapping the blade on You'll get a nice polished gold trigger then
PAUL