NMK309 - SKX/SRPD Slim Flat Sapphire Crystal (for Flat Inserts)



We all know how much of a chonky boy the SKX is and over here at namokiMODS we’re a little obsessed with making it as slim and sleek as possible so we designed a range of Slim Bezels and Crystals to shave off some much needed extra pounds off the SKX007/SRPD.

This NMK309 SKX007/SRPD Slim Flat Sapphire Crystal is designed to be installed with our SKX007 Slim Bezels and a flat bezel insert.

Paired with a flat bezel insert, our Slim Flat Crystal and Caseback, you can have a SKX007 build that comes in at a thickness of 12.0mm, that’s 10% slimmer than the stock SKX007 that’s 13.3mm thick!

Parts Compatibility:
Movement: Compatible with NH35/36/70/71 etc. Not compatible with NH34 (Coming soon!)

Crystal Gasket: Compatible with SKX007 Crystal Gaskets.

Bezels and Bezel Inserts: Any fixed or rotating SKX007 Slim Bezel and Flat SKX007/SRPD Bezel Inserts.


Compatible with SKX007, SKX009, SKX011, SKX171, SKX173, SKX175 and Seiko 5 Sports SRPD Range. Also compatible with new SRPD Collection 5 Sports collection – SRPD55K3, SRPD57K1, SRPD59K1, SRPD55K1, SRPD55K3, SRPD57K1, SRPD59K1, SRPD61K1, SRPD63K1, SRPD65K1, and SRPD65K4 5 Suits collection – SRPD65K2, SRPD67K1, SRPD69K1, SRPD71K1, SRPD71K2, SRPD73K1, SRPD73K2, and SRPD75K1 5 Specialists collection – SRPD55K2, SRPD65K3, and SRPD76K1 5 Street collection – SRPD79K1, SRPD81K1, and SRPD83K1 5 Sense collection – SRPD77K and SRPD85K1

Free International Delivery
  • Your order of S$50 (or equivalent in your local currency) or more gets free standard shipping, and orders above S$200 is eligible for free express shipping! Shipping costs will be automatically deducted at checkout.

Customer Reviews

Based on 19 reviews
Mr. A. (Frankfurt am Main, DE)
NH34 compatible

Good sapphire that works with a 4 hand-stack

Spyros P. (Athens, GR)

Great packaging, great fit

Joel A. (Dubai, AE)
Slim sapphire doesn't even fit

The only mod part which was totally useless was this slim sapphire which doesn't even fit. While the stock oem hardlex was perfect in it's dimensions the namoki slim sapphire was small, to make things worse the gasket provided was too big to even fit into the case. Thinking they gave me the wrong gasket I ordered another 3 piece srpd gasket for the slim sapphire and it was the same story. The gasket being too big to fit into the case and with slim sapphire too small. It would one those reasons or the combination of both which make the slim sapphire unusable for me. I had to use the use the stock hardlex just to complete the mod but it doesn't look with the upgraded slim bezel and slope insert.

Alexis J.D. (Boucherville, CA)
Slim flat sapphire

very well made, tight fit and the AR works great!

Eddie T. (Singapore, SG)
BB GMT mod

As recommended to use the slim crystal on the BB GMT pro bezel for the perfect 70s chic retro look. Easy to install n viola!! I manage to install a NH34 GMT movement! After trying many dials thickness. With a slim sandblast caseback. it really feels n wear slim on the wrist