I was watching this one (definitely not a bidder) and I knew it would fetch a good price. The auction just ended and it went for $5,655.55!
This seller has some really rare/scarce watches and they seem to be commanding some premium prices from a quick look at completed auctions. I imagine someone here has some familiarity with them. I won't list the name so as not to violate any forum rules, but send me a PM if you want or need the name.
Nice looking Cambridge - first one I've seen on the bay.