Edit : added more application (23 Jan 2018)
There have been many request from customer and forumer for a custom springbar for the Seiko Monster, Sumo and MM300 (all having 20mm lug) for mounting on mesh bracelet. Seiko usually make their 20mm lug diver watches with drilled-thru holes and are great for easy fat springbar removal ; as oppose to some of their 22mm lug diver watches with no drilled-thru lug (which can be a challenge to remove these fat springbar !).
I have seen these 20mm fat springbar being reuse for leather strap mounting and its perfectly fine with some force, squeezing it into the leather strap since removal with drilled-thru lug is simple enough. I do them myself too !
But for mesh bracelet, these fat springbar will not fit !
I have turn down many request to install those generic 1.78mm diameter springbar with 0.7/0.8mm pin head, to avoid wearing out the lug holes on prolong usage.
After many months of consideration, i decided to custom a springbar that will fit mesh bracelet and for Seiko 20mm drilled-thru lug diver watches.
They are available now, you can buy them here. They are also suitable for all Seiko Monster, Sumo and MM300 (or any 20mm drilled-thru lug diver watches). They are custom made for mesh bracelet but will also fit into leather strap without stretching the leather.
Springbar – $5 for 4 pcs
International shipping – $10
Total = $15
Price : $15 for 2 pair (4 pieces) inclusive of shipping or you can make a payment here :
Interested, pls contact me here or email me at
Please help support as its costly to custom made mold and fixture for these springbar for specific design. I have paid up front for it and hope it benefit all.
OK enough of writing, here is the product :
Compare against the 20mm fat springbar
Pin head at 1.15mm
Body at 2mm (Seiko fat springbar is 2.5mm)
These 20mm custom springbar will avoid these !
Custom springbar installed onto the Seiko monster
Mounting onto mesh bracelet
Mounting on the Seiko Sumo
Mounting on the Seiko MM300
Even mounting on the Dagaz Tsunami T2 !
Mounting on the modern 62MAS SPB051
*They are recommended only for drilled-thru lug watches.
**It will be nightmare to remove them if there is no drilled-thru lug !