Seiko 'Jumbo' chronograph automatic stainless steel gentleman's wristwatch, reference no. 6138-3002, serial no. 462xxx, black dial with baton markers, minute markers, day/date apertures, subsidiary thirty minute and hour recording dials at the
![Vintage Seiko 6138-3002 "Jumbo" Chronograph Automatic Wristwatch, Men's Fashion, Watches & Accessories, Watches on Carousell Vintage Seiko 6138-3002 "Jumbo" Chronograph Automatic Wristwatch, Men's Fashion, Watches & Accessories, Watches on Carousell](https://media.karousell.com/media/photos/products/2022/3/12/vintage_seiko_61383002_jumbo_c_1647102049_0dcc309f.jpg)
Vintage Seiko 6138-3002 "Jumbo" Chronograph Automatic Wristwatch, Men's Fashion, Watches & Accessories, Watches on Carousell
Thomas' Timepieces - Seiko 6138-3000 and 6138-3002, both models often referred to as the Seiko Jumbo. The Seiko 6138 was arguably the world's first automatic chronograph (Zenith/Movado El Primo also claimed to
![Seiko 6138-3002 'Jumbo' Chrono - opknappen of niet? - Vintage Horlogeforum - Horlogeforum.nl - het forum voor liefhebbers van horloges Seiko 6138-3002 'Jumbo' Chrono - opknappen of niet? - Vintage Horlogeforum - Horlogeforum.nl - het forum voor liefhebbers van horloges](https://www.horlogeforum.nl/uploads/db9961/original/4X/d/f/9/df9901cc300447e0e040cb0a0ede12e73230af25.jpeg)