Just bench-tested and serviced by watchmaker performing in like new condition. Overall the watch is in great condition.
 
If you like rare and unique watches and need something very durable, here is your opportunity to own something unlike most anything else. Tantalum is quite scarce, very expensive to source/manufacture, hypoallergenic, very strong, extremely high melting point, and very hard to work with (tends to resist drill bits). It's also scratch and shatter-resistant. It's an extreme use of watchmaking materials but the result is a look you will not find very often. The significance of this timepiece is felt in its weight.
 
Complete set with many extras.