Hello everyone,

I recently purchased a Seiko 5 watch from a market with a pretty decent price.
Every details tells me it's 100% real, but I can't find the serial number on the case. (glass case back)

Can you help me where can I locate the serial number?

Here's a few pic:

I've found this vintage Orient watch for sale and I'd like to know which model it is exactly.

These are the only images i have.

Can you help me?