Vintage ITT 2C87-10, 10 MHz Math Coprocessor for 286, FPU, Gold Top
Genuine vintage ITT math co-processor for 286. Recently removed from a Rockland analyzer that was cared for and saw very little use.
10 MHz, Intel 287 clone, part number 2C87A02SMBC. Made in the USA
Additional information from cpu-collection.de