My shop just picked up a 1958 Monarch 10EE and it came with a collet closer and half of a set of collets I was looking to complete. The only issue is that the collets are unusual and only marked with the size, while the collet closer is only marked with "Germany". Does anyone have any guesses on the collet type for me to look for others? I searched for a while and can't find anything exactly identical. The straight knurling is unusual as is the externally threaded end without a milled slot like 5Cs have.
Any help would be appreciated.
Thank you
