Reversible watches have been around since the JLC Reverso, but this Seiko HM is the first one of this model we have seen. Model reference 2N00-0070.
HOW DO WE DATE THIS WATCH?
From the serial number on the bottom lug we can date this watch to being made in 1982. The movement was first used in 1980, but we can not find this model in either the 1982 nor 1983 catalogues (likewise for 1992 or 1993). It could be a limited edition or a market specific model, hence it is not in the catalogue.
CONDITION
The condition is excellent – the strap is signed Seiko (as is the buckle), and may be the original which would mean the watch has hardly ever been worn. To make the watch reversible it does need to be off the wrist, and it pivots around the lugs at 12 and 6 as shown in the video. The black dial has a 3D print to it and the numerals on the bezel, whereas the white side has access to the screws that hold the case together. Each dial has its own movement, so you can set the time to maybe home and away when travelling. We will install a brand new batteries before sending the watch out to the new owner. The leather strap is new, and could be swapped for a different colour or material if preferred. The watch is signed on the case, movements, buckle and strap.
This watch will be supplied with our branded presentation box and our Certificate of Authenticity.
Please see the HD video for more detail. All photos and videos are part of the description and are of the actual watch unless mentioned. We do not photoshop any pictures, and the images are copyright of birthyearwatches.com and should not be used without permission.
SIZE
Width with crown 33.4 mm
Width without crown 30.0 mm
Between lugs 16 mm
Lug to lug length 41.8 mm
Case Thickness 8.6 mm
All sizes are approximate. The watch is photographed on a wrist of 190mm/7.5 inches.
Included with this watch is a 3 month guarantee and free delivery to UK addresses. If you live outside the UK we can still deliver to most countries. Please see our Worldwide Shipping information, or Contact Us. Payment can be made by most credit or debit cards, bank transfer or PayPal.
From 1st September 2021 we will be planting a tree for every watch we sell, working with the International Tree Foundation (Est 1922) to make this business positive on carbon. By buying anything pre owned you are effectively reusing what already exists, but this takes it further and makes us feel good.
![]()





























