I looked through most of the thread, and I haven't seen Holben's Fine Watch Bands mentioned. They carry ColaReb, Fluco, Hadley-Roma etc.
I really like Watch Gecko here in the UK, excellent service and good quality products www.watchgecko.com Use “watchgecko” as a discount code for an additional 10% off
I just purchased a Veblenist custom matt grey alligator strap for my wife's very small wrist and we are both delighted with the result. We wanted this color to appoximate the original grey strap supplied with a Hamilton Rutledge and Howard at Veblenist was the only source we found. Highly recommended.
Watch Gecko are a UK Company - link above Alternatively, Watchband Center in Germany are very good. http://www.watch-band-center.com/
Check out https://www.etsy.com/sg-en/shop/HannsonLeatherShop It's about 33 sgd (25usd?) for a piece and their straps are pretty bang for the buck for daily wear. Olive and Blue straps are Hannson as shown
Ben at B Catt watch straps makes a really nice an fully custom product. He was also featured on Fratello: https://www.instagram.com/bcattwatchstraps/?hl=en Edmond at The Leather Strap makes a decent and well priced product. https://www.instagram.com/theleatherstrap/?hl=en Aaron at Combat Straps does some cool and simple types of straps. https://www.instagram.com/aaronbespoke/?hl=en
I just ordered one from Colareb in Italy. Will let you know how it turns out. https://shop.colareb.it/en/
I have purchased five straps and a watch from Holbens (a 1920 Gruen for my wife). Excellent service and fast shipping.
I recently purchased two sailcloth straps from a small company in Singapore. Both straps are for my Hamilton Khaki Automatic. Straps arrived within a week by standard mail. Quality is excellent and four spring bars were included in the package. iwantastrap.com https://www.iwantastrap.com/
interesting. i'm based in Singapore but have never heard about them. will check it out! thanks for sharing