Seiko 6138-7000 “Calculator” Lug Width & Strap Size

Seiko 6138-7000 “Calculator” watches have 19mm lugs and are compatible with 19mm watch bands.

Seiko 6138-7000 “Calculator” case size is 44mm in diameter.

You can shop our entire collection of 19mm watch bands for Seiko 6138-7000 “Calculator” with the link below. Please select size 19mm to ensure compatibility with your Seiko 6138-7000 “Calculator”.