I dont think that Paul Weyersberg was the only producer of bayonets marked with "Tr", i believe that the bayonets without the "crs" marking were made by another manufacturer.
All of the Tr series bayonets are made by Paul Weyersberg. Examination of the bayonet and scabbard construction traits are all consistent with Weyersberg manufacture regardless of a missing 41crs marking. This holds true for careful examination of bayonets that have been disassembled. The internal marking of small parts as well as the stampings encountered on the blade blanks are textbook Weyersberg not associated with a different producer. Again, the markings remain consistent if the bayonet is marked 41crs or not. The serial numbering is in a unique style and shows steady uninterrupted progression indicative of manufacture by a single firm. The numbering is also similar to 41crs marked pieces outside the Tr series. Lastly, the lack of a 41crs marking on bayonet or scabbard is not unique to the Tr series; it is also noted on Weyersberg made pieces in several other letter blocks during 1941 production.