I recently bought a Seiko SRPD55K1 from a legitimate retailer, but I have a few questions about the watch’s authenticity.

1) The serial number is not 6 numbers, but rather a letter followed by 5 numbers: C66705

2) Compared to pictures online, (a) the lugs appear a little longer and narrower and (b) the lower right lug’s brushed section doesn’t curve inward toward the case as it goes up to the crown. Rather the outside edge the brushed top surface of that lug goes in a straight line from…

Seiko 5KX SRPD55K1 Authenticity Question