There's a lot of machines this could be. There is a sequence of them starting with System00 (TTL CPU) various FREDs (1801 CPU) Cosmac ELF/VIP (1802 CPU). The 1801 is a 1802 without the long branch/skip, most of the shift rotates and load without advance.
There are also different version of Chip-8 - at least three, the one that is well known that is part of the VIP, The Studio 2 version and the Fred version which is called FEL-1. Joyce W seems to have been programming all of them. They are all different ; though FEL-1 is much closer to Chip 8 graphically.
FRED 2 (the naming is a bit vague as to what is what) was produced in small numbers (about 20) to demonstrate to potential buyers. To confuse matters furthers, the FRED papers I acquired from Hagley also have a design for a Cosmac Coin-Operated machine (1801 based) which appears to have been constructed at some point but got no further.
It is interesting how different things could have been if different management decisions had been made in respect of the 180x stuff. This stuff predates Space Invaders.