A souvenir from the 1st open source MPW shuttle run.
The program was sponsored by Google, facilitated by Efabless and manufactured by Skywater on their 130 nanometer process.
100 dies were received, and 70 were set in a 20mm resin cube.
Note that due to being cast in resin this die cannot be used.
More information about the chip can be found here:
https://www.zerotoasiccourse.com/post/asic_submitted/