1675 with cert that matches but not quite?

[shairan]

This is on ebay. The case is 3m series, in 70's? The cert punched no.s match the case serial but dated '85. What could be the reason for 15 year gap - which sounds too long for a watch to be kept in window display.

and I remember seeing the 'same' watch on ebay, at least a similar one with missing lume on 24h hand but without cert.

But I am a newbie here, and could just be plain confused and ignorant.

http://www.ebay.com/itm/ROLEX-Vintag...#ht_500wt_1159