Case back:BULOVA,L1 and serial#
Inside case back:BULOVA,10K ROLLED GOLD PLATE BEZEL,STAINLESS BACK,NEW YORK
10CSC 17 jewel movement is dated L2
Crown is unsigned
Dial:Gold applied #s and has luminous dots at the hour marks and seems different than my other 51 duo-wind.It also doesn't have numbers around the seconds ring .