The 6458-6020 JDM Diver is an interesting watch for three reasons. The first is that at 38mm it was smaller than most divers of the time, secondly it was only produced for the domestic market in Japan for less than a year between 1984/5 and the third is that Seiko gave it the status of 'Professional' and rated it to 200m. Little is known about the reason Seiko introduced this watch which had it's roots in the the 7548-7000, Seikos first attempt at a quartz powered dive watch that had a case size of 42mm. After the very short production run the 6458 was replaced in 1986 by the 7C43 which was also sized at 42mm. So with a mysterious less than one year production run and considered 'mid size' the 6458-6020 is interesting & fairly rare, especially in good condition. It's also the perfect option for anyone looking for a slightly smaller sized diver.
This watch dates from February 1985 and was my personal daily wearer for many years, serving me faithfully on my travels all over the world. Click here to see Instagram post about the watch - I have used it many times for water sports including shallow dives, swimming and surfing and although I am confident it will be fine I have not pressure tested it recently and will not be guaranteeing it as waterproof.
Dial: Black, in excellent condition, hour marker lume in nice condition
Bezel: Original bi-directional with good movement and click. Original insert with some UV fade giving it an interesting blueish patina.
Day/Date at 3 o'clock Day in English and Kanji, features the classic Saturday in blue and Sunday in red
Glass: Original Hardlex with a couple of scratches but still clearly legible
Hands: Original, very good.
Case: Original, unpolished stainless steel, minor age related wear but no dings, case-back is excellent with serial number and reference very well defined
Diameter: Approx. 38mm
Lug width: 19mm
Band: Contemporary Bambi rubber dive strap in excellent condition
Crown: Original screw down, well fitted
Year and location of manufacture - Feb 1985 - Serial No.525164 - Japan