I've found a couple other posts around the web from 10-20 years back trying to identify this card, but no mention of model. All I can see is probably pretty obvious. 20MHz rated 68020 and 68881 that appear to be clocked at 25MHz, 16KB (2 64 kbit Micron chips) cache that appears to be rated at 25ns. (40MHz) The thing I find curious is that it's populated with a 68020 but is screened to say it fits Macs with 68030s. Perhaps the board could have been optionally configured with an 030?