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The Classic GL831 Rubber Diver Strap (19/20/21/22mm)

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Uncle's notes

Arguably the greatest (and most comfortable) diver strap Seiko ever made was the GL-831. It was the stock strap that came with the 6306 and 6309 divers, as well as H558 "Arnie" and the 7548 quartz diver, among others. Fans have been raving about them for decades. Today they are hard to find because many got stiff over the years and began to crack in all the wrong places.

It has been my dream to recreate this iconic strap and make it as close to the original as possible. I believe I have met this challenge, with a couple of minor changes. I made it slightly thinner and more flexible (like the original gets when exposed to warm temperatures).

It measures approximately 78mm x 130mm, so it is not absurdly long like many of today's rubber straps. Compatible with most 22mm diver watches. 

If you are one of those guys who likes to wear a tight strap, you need to get this one! No breaking-in time necessary. If you like a daily wearer and have been looking for a comfortable strap that has the classic diver look, you have found it.

What length should I get?

If you are under 7 inches (18cm) then go with the shorter version. Someone right at 7" (like myself) could choose either, it just depends on how much "tail" you want extended past the keeper. 

What's included

One rubber strap, one pair of 2.5mm spring bars, one (bead-blasted buckle).

If you are buying this for the Seiko 5 SRPD or if you plan to wear this strap on a non-diver watch, please request the custom spring bars when you checkout. 


  • 22mm STANDARD: 78mm x 130mm
  • 21/22mm SHORT: 74mm x 124mm
  • 20mm STANDARD 78mm x 128mm
  • 20mm SHORT 70mm x 120mm

You can also purchase black hardware that is compatible with this strap. 

Please note: For 21mm straps, 20mm bars with be included as I don't carry that size. 


"Honestly....I need like 10 of these" --@vanquish_

"This may be your best rubber to date" -- Brian, TX

"About as perfect as a thing can be in an imperfect world" --Saul, FL

Shipping Info

Shipping Rates

Domestic USA Nationwide Flat Rate: 

- $4 USPS First Class (4-6 business days)

- $8 USPS Priority Mail

- $8.5 FedEx 3 DayInternational

Worldwide Flat Rates:

- $14 First Class International (2-4 weeks) *not available for all destinations

- Variable pricing FedEx International Priority (3-5 business days)

Processing, Tracking & Insurance

Please allow 1-2 days for processing time.  All of our shipping options include tracking and insurance. First Class International may have limited tracking options depending on destination. 

PLEASE NOTE: If you are an international customer and you chose USPS as the carrier, it is common for the package to sit for 2-3 weeks at a distribution center in Los Angeles. Nothing is wrong and it is not lost. This is where they wait for flights. If you prefer something faster, please select Fedex, which is 3-5 days to your door.


As of July 1, 2021, all orders shipped to the EU will require a value added tax (VAT) to be paid by the recipient at time of delivery.  Other international orders may require a customs duty once reaching their destination. These fees are a separate charge often imposed by the destination country or region and are not the responsibility of Uncle Seiko.

PLEASE NOTE:  I am aware that many countries charge a large import fee on top of the purchase price. This money is collected at the time of delivery and has nothing to do with Uncle Seiko Straps. Because the fees are based on the price of the item, it is advantageous for buyers to request a lower price recorded on the customs form. However, I cannot alter the price. In the U.S. it is considered a crime (mail fraud). Thank you for understanding. 

German Customers

When USPS packages arrive at the customs office in your country, they are marked as delivered. What typically happens is that within the next few days, they contact you to pay import fees to receive the package. If you have not received your package and it shows as delivered, do not be alarmed, as they should be contacting you soon. 

Return Policy


We want you to be happy with your purchase, so we aim to provide flexibility with returns.  If you received a bracelet or strap that is defective, please email us and we will provide a shipping label for the return.  We will make it right!

If you are unhappy with your purchase for any other reason, please send us an email and mail back the item in original, unused condition within 30 days for a full refund - no questions asked.  The buyer is responsible for return shipping fees.  If the bracelet has been sized or the plastic has been removed, we require a 15% restocking fee upon return.

We will notify you as soon as we receive and inspect your return.  Returns are processed in batch once per week (usually on Saturdays).  If everything is accurate, you will be automatically refunded on your original payment method. Please remember that it can take up to 7-10 days for your bank or credit card company to process and post the refund.

For any questions or to notify us about a return, please email

Exceptions / non-returnable items
Sale items or factory defective items cannot be returned. 

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.


Uncle Straps, Inc aims to sell high quality merchandise that will provide the buyer many years of use.  All Uncle products are used at the discretion of the purchaser.  Uncle Straps, Inc is not liable or accountable for any damage to your watch while using, installing or removing any of our products.

  • Wondering if this product will work with your watch? I do my best to outline compatibility details here so you can ensure a good match.

    For bracelets, some of the compatible models listed are submitted from my customers, and therefore I can't guarantee the fit will be perfect.

    Occasionally these matches require some light modifications to fit correctly. I've outlined these steps over on the Bracelet Mods, Tips & Tricks page.

  • Compatible Models

    19/20/21/22mm watches

Fast Shipping

Orders typically ship within 24-48 hours. Please allow additional handling time during peak holidays.

Secure Payment

I accept all major credit cards as well as PayPal, ShopPay and MetaPay

Satisfaction Guaranteed

I want you to love your straps and bracelets. If you don't, send it back for a refund or exchange - no questions asked.

As a supplier of vintage bracelets in particular, [Larry] has become a valued resource for the vintage Seiko community, that now relies on him to provide bracelets that not only look authentic and period-correct but are often of higher quality than Seiko’s original.

Beyond the Dial

I love Uncle Seiko. I often wish he was my real uncle. . .Overall, I’m pleased as punch with what I’ve seen/touched/worn from Uncle Seiko’s collection of faithful but improved-upon straps and bracelets.

Two Broke Watch Snobs