I'm the lucky owner of Mark C's former Pinball Magic.
It's running V1.0.2 eproms . . .
Here is what is embossed on the chips themselves:

U24 (Music) Intel P87C52  L4472481A
U28 A-00471  3MI  AK9539Z01
U29 A-00471  3M2  AK9539Z00
U30 (Music) 27C40000DC-12  M1733-A

Below is a link to Pfutz's site. This is the V1.0.2 ROM upgrade service bulletin.
I hope this helps.
And it IS a wonderful game!