Doxa
SUB 300 821.10.011.10— lug 20mm

The lug width of the Doxa SUB 300 821.10.011.10 is precisely 20.00 mm. This measurement must be verified using a digital calliper, positioning the tool perpendicularly between the inner edges of the watch case lugs. It is the critical parameter for selecting a compatible strap without lateral play or mounting resistance.

For the SUB 300 821.10.011.10 we recommend vegetable-tanned leather straps for elegant daily wear, cotton-satin NATO or nylon straps for frequent diving, and vulcanised rubber (FKM or esterel) for prolonged humid environments. The choice depends on use: formal (leather), technical-diving (rubber), balanced (NATO).

Use a spring bar tool to gently lift the lug spring. Position the flat lever under the small metal ball at the end of the spring, then lift until the lug is freed from the case. Repeat on the other end. Insert the lugs of the new strap into the slots and press until the spring clicks. Verify alignment before wearing.

Yes, provided the lug width is exactly 20 mm and construction quality is appropriate to the watch's value. An artisanal strap with noble metal fittings, reinforced stitching and naturally tanned leather perfectly complements the SUB 300, amplifying its technical character or elevating its elegance depending on the material chosen.

A vegetable-tanned leather strap lasts on average 2-4 years with moderate daily use. Longevity depends on frequency of exposure to water, humidity, perspiration and tanning quality. A vulcanised rubber strap has superior durability (5-8 years), whilst a cotton-satin NATO can last indefinitely if washed periodically.