![1972 Seiko Jumbo Chronograph 精工大珍宝计时款 6138-3000 (Original Stelux Bracelet) - MOVEMENT SERVICED, Luxury, Watches on Carousell 1972 Seiko Jumbo Chronograph 精工大珍宝计时款 6138-3000 (Original Stelux Bracelet) - MOVEMENT SERVICED, Luxury, Watches on Carousell](https://media.karousell.com/media/photos/products/2023/6/1/1972_seiko_jumbo_chronograph___1685607857_12d8584e.jpg)
1972 Seiko Jumbo Chronograph 精工大珍宝计时款 6138-3000 (Original Stelux Bracelet) - MOVEMENT SERVICED, Luxury, 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
![Vintage Seiko Jumbo Chronograph ref. 6138-3002 – 1975, Serviced, Original Bracelet - ChronoTimepieces Vintage Seiko Jumbo Chronograph ref. 6138-3002 – 1975, Serviced, Original Bracelet - ChronoTimepieces](https://chronotimepieces.com/ctsitecms/wp-content/uploads/Seiko-Chronograph-Jumbo-ref.-6138-3002.jpg)