It's a ten digit Nixie driver tube, sadly, when I start to experiment I'll have to wire up a loom of female pin connectors since I don't have a proper socket for it.
Here's the functional diagram for this beast. Hails from the era of massive computers, I have machinations of deploying this in a repurposed manner, but am following my gut in terms of avoiding spouting too much nonsense before experimenting with it.
I'm hopeful I can utilize hardware from the same people that brought us the Bat Computer in the 1960s TV show. Here's a page with some nice top end shots of these: http://www.decadecounter.com/vta/articleview.php?item=313
Mine are similar to the two variants at the bottom of the page.