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
![NOS SEIKO JUMBO Vintage automatic chronograph watch Ref. 6138-3002 Cal. 6138 + BOX *** NEW OLD STOCK *** Seiko Vintage watches - Watches83 NOS SEIKO JUMBO Vintage automatic chronograph watch Ref. 6138-3002 Cal. 6138 + BOX *** NEW OLD STOCK *** Seiko Vintage watches - Watches83](https://watches83.com/56640-thickbox_default/nos-seiko-jumbo-vintage-automatic-chronograph-watch-ref-6138-3002-cal-6138-box-new-old-stock-.jpg)
NOS SEIKO JUMBO Vintage automatic chronograph watch Ref. 6138-3002 Cal. 6138 + BOX *** NEW OLD STOCK *** Seiko Vintage watches - Watches83
![Seiko 6138-3003 Jumbo Automatic Chronograph Full Original Very - Etsy | Vintage watches, Chronograph, Seiko Seiko 6138-3003 Jumbo Automatic Chronograph Full Original Very - Etsy | Vintage watches, Chronograph, Seiko](https://i.pinimg.com/736x/da/06/02/da06022a97fa8931ce79fa918d1b6791.jpg)
Seiko 6138-3003 Jumbo Automatic Chronograph Full Original Very - Etsy | Vintage watches, Chronograph, Seiko
![Seiko Jumbo Chronograph Vintage Watch. Citizen Omega Rolex Tissot Gift Ideas Casio Tudor Hamilton Birthday Anniversary Love Retro Military - Etsy Seiko Jumbo Chronograph Vintage Watch. Citizen Omega Rolex Tissot Gift Ideas Casio Tudor Hamilton Birthday Anniversary Love Retro Military - Etsy](https://i.etsystatic.com/22681882/r/il/18a465/4964005036/il_fullxfull.4964005036_rtpg.jpg)