D4H00D

Hallo All, First of all sorry I don't speak German! I recently bought a Puch frame in Hungary, which was sold to me as a Mistral Competition 86-87 model, but I have some doubts if it's really a Competition model. After reading through the forum with google translate I think the frame is maybe a Mistral Ultima and the fork is a Competition or maybe just a replica? If anyone knows for sure please let me know! My other question is anyone knows what the BCM graving indicates under the top tube or maybe the frame is a replica as well? Thanks Árpád