To the best of my fading memory, System 7.1 Update 3 is not synonymous with a System 7.1.3, wot of there never was one. However, there was/is a Finder 7.1.3. Some reference to the matter can be found at http://68kmla.org/forums/viewtopic.php?f=7&t=8770&p=89204.
I have used such a retrofitted System 7.1 in a RAM-throttled Colour Classic (recte a Performa 250), as well as in a IIci (with umphed-up RAM), but the IIci Macs have now all passed-on to OS 7.6.1 in keeping with their DayStar 030 and 040 cards.
I have used such a retrofitted System 7.1 in a RAM-throttled Colour Classic (recte a Performa 250), as well as in a IIci (with umphed-up RAM), but the IIci Macs have now all passed-on to OS 7.6.1 in keeping with their DayStar 030 and 040 cards.