Long body Anafaze CLS series:  List of PROM's used

• ST27FS010  ... this is flash and thus can be electronically erased
• M27C1001  This is a OTP ( One Time Programmable ) part   -  Pin for pin replacement: ATMEL  AT27C010  - also OTP but there appears to be a UV eraseable version here

Short body Anafaze CLS series