From Newsgroup: rec.games.pinball
On 4/29/2020 4:39 PM, MySeeburg wrote:
I bought a large pile of Bally -17 and -35, in this pile there was one -133 that had already been converted to become a -35. My question is: Did Bally ever put out a -133 mpu that had the normal -133 printed in white ink? The one I have is just after the AS-2518 (printed in white ink) it is stamped -133 in black with a non matching font size. TIA, Tim, Stillwater, MN
Not a direct answer to your question and you may already know this...
IPDB shows 5 games in the 1982-1984 time frame that used the 2518-133 MPU.
I looked it up because I hadn't heard of the -133 and thought it might
have been some type of prototype board.
- Kerry
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