Hello!

I'm trying to gauge the value of this Seamaster 30 Cal. 286. I've been looking at vintage Seamasters, and this one came up for about $400. Things I'm a little unsure of: the seemingly blank caseback, the seemingly non-lumed hands, and my difficulty in finding anything thats an exact match of the dial + hands.

Trying to get better images of the back.

(I should mention this is being sold on a site that is more known for modern clothing, and I'm not shocked the pictures and description are inferior. I was surprised to stumble upon it.)