File:Motorola XC68LC040FE25B PowerBook 520 processor card.jpg

A PowerBook 520 daughtercard with a 50/25MHz QFP version of a Motorola 68LC040 processor, which does not contain an FPU.

Source

 * Apple 25MHz PowerBook 520/520c Daughter Board 661-0122 XC68LC040FE25B by memoryx, eBay. 2019-08-05.