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Seiko 5 Sports 38mm SRPK29, SRPK31, SRPK33, And SRPK35 Flat Sapphire Crystal – CT142
$40.00 Select options This product has multiple variants. The options may be chosen on the product page -
Genuine Seiko 4R34 Automatic Watch Movement GMT Hacking Function – Made in Japan
Price range: $186.00 through $204.00 Select options This product has multiple variants. The options may be chosen on the product page -
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Limited Edition SARB Alpinist Style Case Set – CT728 Polished/Brushed
Original price was: $228.00.$198.00Current price is: $198.00. Add to cart
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TOP RATED PRODUCTS
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SKX007/SRPD/SSK GMT Double Dome Sapphire Crystal For Sloping Bezel Inserts – CT037CIS
$50.00 Select options This product has multiple variants. The options may be chosen on the product page -
SKX007/SRPD/SSK GMT Double Dome Sapphire Crystal For Flat Bezel Inserts – CT037F
$47.00 Select options This product has multiple variants. The options may be chosen on the product page -
Seiko (SII/TMI) NH35 Automatic Movement – CT501
Price range: $70.00 through $76.00 Select options This product has multiple variants. The options may be chosen on the product page -
Seiko 5 SNK Double Dome Sapphire Crystal – 30mm – CT063
$42.00 Select options This product has multiple variants. The options may be chosen on the product page -
SKX007/SRPD Flat Sapphire Crystal – CT025
$40.00 Select options This product has multiple variants. The options may be chosen on the product page
CASES
build your dream watch-
Sale!
Limited Edition SARB Alpinist Style Case Set – CT728 Polished/Brushed
Original price was: $228.00.$198.00Current price is: $198.00. Add to cart -
Vostok Conversion Case – Modtok Collaboration – CT727
$95.00 Select options This product has multiple variants. The options may be chosen on the product page -
SKX007/SRPD Slim Sub Case + Bracelet – Polished/Brushed – CT725
$112.00 Select options This product has multiple variants. The options may be chosen on the product page
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OUR BLOG
NH34 “Death Zone” Explained
An important and costly mistake all NH34 owners must be aware of! The “death zone” for the Seiko NH34 (and…
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The State of the Seiko Mod: 2026 Trends and Where to Build Your Masterpiece
The world of Seiko modding has evolved far beyond simple bezel swaps. In 2026, the hobby has matured into a…
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CT716 Panerai x SKX007 GMT NH34 Build
*all parts from Crystaltimes USA…
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The State of Watch Modding in 2025: A Personalized Revolution
A Creative Frontier Watch modding—customizing and revamping stock watches—has surged from niche hobby to full-fledged creative movement. It’s more than…
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Crystaltimes USA: Your Seiko Modding Partner
Crystaltimes specializes in the design and manufacture of Seiko Mod Parts. We've been producing parts for the Seiko Mods Community since 2012, and have 30+ years of product development experience. Our Mission: Provide you with the highest quality watch mod parts to build your dream watch, and give you a world class customer experience. Shop the largest selection of Seiko Modification parts in the United States. All parts are stocked and shipped from Irvine, California. Read More
FOUNDED ON QUALITY. BUILT ON SERVICE.
50,000+ HAPPY MODDERS SINCE 2012.