Hi! It's the OEM Viceroy Heat strap. I don't know if it's easy to find like a spare. Otherwise I would fit the Archer: https://www.archerwatchstraps.com/products/quick-release-silicone-portland-orange
I have a telememo too! (black resin). I own it since 1992, when I was 14 years old, and after 30 years, it works perfectly fine. Impressive reliability of this Casios! I still keep also the original users manual.
I have all kind of straps and the ones I feel more comfortable and versatile are the silicone ones.
The orange strap on my Viceroy is well ventilated and really soft and comfortable.
The OEM Seiko divers silicon straps have a great finish, comfort and quality, although they are pretty expensive (here in Baby Tuna and Arnie). Their metallic keeper gives a great quality feeling but some complain about it. For me is completely fine and I like it.
Great collection, I love them! I used my Arnie this summer in Menorca and it feels really comfortable, although the size. My baby-tuna "Save e Ocean" is other of my favourites, I love Seiko divers!
The second one would be the Seiko 🐢 Hulk green. Overall, as mentioned, people don't care about the watches, but when it is a big watch with bright colours it catches the attention.
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