I looked again and there are 2 "16" in circles and 2 "16/1" below them on the flats.
The bottom of frame is engraved: SYSTEM HEYM 60215 D.R. PATENT all arranged in a football type shape.
I missed this post, so the frame was more than likely sourced from Heym.
Kind Regards,
Raimey
rse
I failed to note that D.R.P. 60215 was the infamous Heym drilling patent of May 24th, 1891 which up to 1923 was in place for 15 years so it was made between 1891 and 1906? Heinrich Leue was alive during about 1/2 of the period but I seriouly doubt he added anything to the piece.
Kind Regards,
Raimey
rse
