Recently I received a watch my dad used to wear - a Seiko Chronograph 7T42-7A5A. Since I’m curious about the history and details of the watch I decided to gather it on this page. I will update the page as I gather information, so it’s something of a perpetual work-in-progress.
History
When searching or the watch online, it’s usually called Seiko Olympic Chronograph, and with a reference to a year in the early 90s. I’ve seen reference to ‘91, ‘92 and ‘93. I entered the watch model number, as well as serial number, into the Seiko Date Finder, which came back with back unsure. But in standard Seiko fashion the first number in the serial number indicates the year it was made in, and the second number/letter referending the month. Since my watch’s serial number starts with 1N, it should have been made in 1971, 1981, 1991 or 2001 in November. I have seen several people on the internet describing it as the Seiko 1992 Barcelona Olympic Chronograph, so that’s my guess. And if it was made for a 1992 olympics, it wouldn’t be surprising for Seiko to produce it in late 1991.
Looks
The watch is a black and gold chronograph, and seems seems to have come on either a gold colored bracelet, or on a brown leather strap. Images below.
Data
- Case diameter: 40mm?
- Case lug-to-lug: 44mm?
- Lug width: 19mm
- Thickness: 8.5mm?
- Battery type: R399
There are several watches with the case code 7t42-7a5a, so the “real name” is one of the following:
- SDX044J1
- SDX044J3
- SDX048J1
- SDX048J3
Other models
It seems very similar to 5T52-7A29, with the exception of that having a world timer, and obviously another movement.
Media
Watch with bracelet - Source: Uhrforum
Watch with leather strap - Source: Catawiki