The Seiko serial number decoder pages. My collection of vintage Seikos
For Sale - 1978 Seiko C153-5007 Calculator Watch - SOLD | The Watch Site
Vintage SEIKO CALCULATOR Watch Model 5007 Original | Etsy
Seiko C153-5009 Silver - Time Art Piece
birthyearwatches.com - 1977 Seiko C153-5009 Calculator watch. Can you see what I did there? #seikolover #seikocollector #seiko #1977 #birthyearwatch | Facebook