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Shop custom Casebacks for your Seiko mod here! Crystaltimes is generally known for their Sapphire Crystals, but has ventured into the Caseback category due to high demand from customers. In this category you will find a variety of caseback options with custom engravings. You also find sterile casebacks. Browse the caseback items below to find a suitable match to your watch model. Can’t find your specs? Write us an email and we will add it to our production line!

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  • CT200 – Caseback

    Material – 316L Surgical stainless steel.

    Type/Design – Sterile case back no identification 200M rated.

    Suitable for – Seiko divers 200M 0020 case type SKX007 SKX009 SKX011 SKX171 SKX173 SKX175 SKXA35 SKX401K. 6309-7040 6309-7049 6309-7290 6309-729A 6309-729B 6306-7000 6306-7001. All New and Old Samurai models. Vintage 150M 6306 6309 7002 – All variants.

    Mid-Size 200M – SKX013 SKX015

    Ref dimensions – Seiko OEM dimensions.

    Finish – All options Fine Sand Blasted.

    Options – 4 Options available

    Option A: Sterile

    Option B: Laser Etch – Holiday Paradise

    Option C: Laser Etch – Sea Game Fishing

    Option D: Laser Etch – Diving/Zombie Outbreak

    Option E: Laser Etch – Hunter

    Option F: Laser Etch – ZRT (Zombie Response Team)

    ALL OPTIONS SUPPLIED WITH NEW CASE BACK GASKET.

    Additional info below in product description

    $17.95$24.95 Select options
  • CT406 – Caseback Gasket

    Description – Case back gasket – oem spec.

    Suitable for 200M – SKX007 SKX009 SKX011 SKX171 SKX173 SKX175 SKX401K SKXA35 – CT Crystals ref CT011 CT025 CT037 CT037CIS CT037F CT043 CT094

    Suitable for 200MNew Prospex “Turtle” 200M SRP773 SRP775 SRP777 SRP779 SRP787 SRP789 SRPC44 SRPC23K1 SRPC25K1 SRPC49K1 “PADI” Versions –  SRPA21 SUN065 – Blue Lagoon SRPB09 SRPB11 – CT Crystals ref CT057 CT072 CT075 CT076 CT096

    Type/Design – Water resistant case back gasket – Tested during development to 300M.

    Additional info below in product description

    $3.95$16.75 Select options
  • CT231

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    Material – 316L Surgical stainless steel

    Type/Design – Sterile case back no identification 500M rated – High polish finish – Integral spacer built in to allow fitment of movements with the thinner grey movement spacer e.g. NH35/36

    Suitable forSeiko divers 200M 0020 case type SKX007 SKX009 SKX011 SKX171 SKX173 SKX175 SKXA35 SKX401K

    Mid-Size 200M – SKX013 SKX015

    Important – This case back cannot be used with the thicker black movement spacer – our CT200 is the case back for that purpose

    Finish – High Polish

    SUPPLIED WITH NEW CASE BACK GASKET

    Price – 21.95 USD

    Additional info – 500M rated Sterile case back ideal for personalization custom laser etching. Supplied with new gasket/seal.

    $21.95 Read more