Small Turtle modification (mod) watch case designed for building custom diver-style watches, inspired by Seiko's classic "Turtle" (SRP series, also called Abalone) and "Tuna" (shrouded diver) designs. These cases are popular in the watch modding community for upgrading or building homage watches using affordable Seiko NH35/NH36 automatic movements.

Key Specifications 

• Material: 316L stainless steel (durable, corrosion-resistant)
• Case Diameter: 41mm (modern wearable size)
• Thickness: 12.7mm
• Crown Position: Offset at approximately 3.8 o'clock (common in Turtle-style cases for comfort)
• Bezel: Fits outer diameter 38mm, inner 31.5mm (likely a rotating diver bezel)
• Dial Fit: 28.5mm diameter (standard for NH35 movements)
• Movement Compatibility: NH35, NH36, NH34, NH38, and similar (e.g., 4R36)
• Crystal: Sapphire glass (scratch-resistant, high clarity)
• Water Resistance: 100 meters (10ATM) with screw-down crown
• Case Back: Solid stainless steel (screw-in for waterproofing)
• Lug Width: 19mm (for straps/bands)

Shipping:

1. We will post your item within 48 hours after the payment is completed.

2. Transport time varies with different shipping methods and the distance.

Please Note:

Delivery time depends on many factors ,if you don't receive you item more than 40 days, please contact us, we will check and solve the problem for you.

Feedback

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If you contact us before leaving 1-3 star feedback, we will be happy to provide satisfactory solutions.

Your satisfaction is our goal, if you have any question,please contact us,we will reply you in 24 hours!

Return:

We can give you a full refund for items returned within 15 days of you receiving them if your items are returned in their original condition. Buyers need pay for the return shipping fee. Once receive the return item, we will refund you immediately.

Thank you and enjoy your shopping in our store!