Die IDs

Product Version Silicon Notes
CT1351 202 Intel 80C51
CT1741 405 MHS 80C52
CT1741 412 Signetics 80C52
CT1741 413 Intel

https://docs.google.com/spreadsheets/d/1aLhBRC7yeuQ5J7GvhqMpHjUCUAjUm27tkCzqkMWY3Ik/edit?usp=sharing

Chips