Its origins can be traced back to the obsolete SKS195P which happens to be my second Seiko watch. The SKS family were fitted with the discontinued V657 caliber. The 7T92 that is used with your model is a vastly improved movement.
The features of the two calibers are:
V657
- Sweep perpetual second hand
- Chronograph resolution of 1/10sec (sub-second hand actually runs at 1/5sec)
- 1/10sec register runs for 1 minute then stops to save power
- Stopwatch measures up to 60 minutes, then resets
- Separate elapsed minute and second chrono registers
- Tachymeter markings on seconds register
- Screw-down crown
- 2yr battery life
- Discontinued sometime in 2001
7T92
- Perpetual second hand in subdial
- Chronograph resolution of 1/20sec (sub-second hand runs at true 1/20sec)
- Stopwatch measures up to 12 hours, then resets
- Single elapsed hour/min register
- Screw down crown
- 3yr battery life
- In production to this day
There were several variants of the SKS-series Flightmasters:
- SKS193P (silver-white)
- SKS195P (black)
- SKS197P (shiny blue)
- SKS198P (gold)
When Seiko discontinued the V657 Flightmasters, it decided to carry forward the just the black and blue versions. Perhaps the gold plated and silver models didn't sell that well, so they were both dropped.
See if you can tell the differences between the SKS195P and the SND253P.
Here's my SKS195P. I got tired of the 20mm Oyster bracelet and switched to a Morellato leather strap.
Hope this helps.
cheers,
StratMan
It's your
watch watch collection that tells most about who you are.
