eBay seller danfuboco. Label is a little odd since that company makes milling machines. Seller has info below although I don't really know how they arrived at that. I don't know the actual year, marked date is approximate.
Rare 1960's Solitron PNP Transistor Silicon Wafer 2 in.
CINCINNATI MILACRON CM NO. 672-1 LOT NO. 61-807-257 SUBS p___(ohm)-cm t___ mils 1st EPI. p 34.4 (ohm)-cm t 57.2 um. 2nd. EPI. p ___ (ohm)-cm t ___ um. TYPE (N/N+) P/P+ N/P/P+ P/N/N+ N/P P/N P/N+ N/P+ BDV. ___
56XC109-95 REJ-20 P256-35