Custom springbar for Seiko SKX779, SPR309 (Monster), SBDC001 (Sumo), MM300 on mesh bracelet

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.

SEIKOdiverovallughole1_zps861da876

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.

Price : $12 for 2 pair (4 pieces) inclusive of shipping
Contact me for paypal details.

Interested, pls contact me here or email me at

seikoparts.wordpress@gmail.com


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.

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OK enough of writing, here is the product :

Photo 26-2-15 3 53 07 pm

Compare against the 20mm fat springbar

Photo 26-2-15 2 41 22 pm

Pin head at 1.15mm

Photo 26-2-15 2 49 51 pm

Body at 2mm (Seiko fat springbar is 2.5mm)

Photo 26-2-15 2 50 09 pm

These 20mm custom springbar will avoid these !

SEIKOdiverovallughole1_zps861da876

Custom springbar installed onto the Seiko monster

Photo 26-2-15 2 41 29 pmPhoto 26-2-15 2 42 29 pm Photo 26-2-15 2 41 59 pm

Mounting onto mesh bracelet

Photo 26-2-15 2 45 31 pm Photo 26-2-15 2 46 47 pm

Mounting on the Seiko Sumo

Photo 26-2-15 3 49 15 pm

Mounting on the Seiko MM300

Photo 26-2-15 3 51 08 pm

Even mounting on the Dagaz Tsunami T2 !

Photo 26-2-15 3 46 54 pm

*They are recommended only for drilled-thru lug watches.

**It will be nightmare to remove them if there is no drilled-thru lug !

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