I have a Pace 56 Voice Modem for Mac.
This seems to be for the Pizza Box and later stuff up to, and
including the Beige G3 Powermac.
I do not know if it works - nothing left to test it on - but there is
the modem, PSU, Mac-to-modem cable, Manual and the floppy disk with
the modem script.

Free to anyone with the price of postage, or collect from West
Wiltshire.  By the weekend it will be on Freecycle if not claimed.

geoff