I have such a vice, it was from PanaVice. It is indeed basically for thru-hole products. When I was assembling much larger boards with all thru-hole stuff, I used the vice a lot, it hasn't been out in years. In the 1980 when we were producing video equipment for Wall Street firms, I made about 50 of these when we had a supplier punk out on us and we had to ship product. This is a 2-channel video board, something you can do now in about one square inch of PCB! My, how the times have changed!
Yes, the oscillators are tied into the sockets using waxed string. All the chips are in sockets as well, you don't see that much anymore!
This is the vice I have, just a slightly later model, mine doesn't have the little release lever on the one side.