Seiko 5 7s26-03j0 Automatic Watch

Movement (7S26) 

Type: Mechanical, automatic (self-winding)

Jewels: 21

Accuracy:

+45/−35positive 45 / minus 35

+45/−35

seconds per day

Power Reserve: Approximately 41 hours

Manual Winding: No

Hacking: No (the second hand does not stop when the crown is pulled out)

Features: The movement is known as a durable workhorse, but it is an older design that doesn't include modern features like hand-winding or hacking. 

Case and model specifics 

Case Size: 38mm (without crown)

Lug Width: 20mm