In January, 2013 I began shopping for an inverto set. I passed up bidding on one set with the jeweling attachment (which ended up selling for $530). I then watched another nice complete Inverto 18 set, but it ended up going for $510 without the jeweling attachment, which suprised me, but it was a complete set, albeit with some rust. Interestingly the bids sat at $210 for days, and in the last 2 minutes jumped 210, 360, 410, 449, 510. Such is the nature of Ebay, sniping usually brings home the goods. On closer inspection of this set, I believe it included the jeweling attachment, hence the price was actually to be expected. I just didn't recognize it as it was not mounted on the base.
The first thing I hope to do with a staking set is to replace a friction fit balance staff in a Waltham 1908 pocket watch. K and D sold a special set 13 with the stumps and stakes to do this for several size watches (16, 12, and 0), and the word is that some Inverto sets include these stumps.
Tom's notes / tom@mmto.org