I finally got this board today. It took a month to arrive and the package was soaked by rain - never use Mondial Relay to ship something to Germany.
It miraculously survived, only the vertical battery holder broke off and I'm currently looking for a replacement that will fit.
The first thing I did was measure all of the capacitors. Only two of them were bad. They were 2700uf/6.3V Teapo ("Cheapo") caps which were wildly out of spec:
bad-2700uf-cheapo.jpg
I replaced them with 3300uf/6.3V ones and they seem to work well. The majority of capacitors are those 4700uF/6.3V ones which all measure in the 5000uf range - the ESR is good though, so I guess on this board they just used capacitors with a very high tolerance:
fine-4700uf.jpg
I also modded a second Tualatin PIII-S 1.4GHz and the board just takes those two CPU's without any problems, even the detection by the BIOS just works.
modded-tualatin-cpus.jpg
bios-detection.jpg
None of these boards seem to come with backplates (at least the ones currently on eBay all don't). To my surprise, the backplate from an Abit VH6T fits very well, it just has a few more holes because this board doesn't have audio or a Gameport.
vh6t-backplate.jpg
Time to run some benchmarks now, I guess!