Smartlet One

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Wear a smartwatch with your Doxa SUB 300 | Smartlet

Compatibility guide

Wear a smartwatch
with your Doxa SUB 300

Smartlet is compatible with the Doxa SUB 300. All steel references use 20mm lugs, natively supported with no adapter. Installation uses the standard spring-bar system - no modification to the watch, fully reversible in seconds.

ModelDoxa SUB 300

Lug width18mm / 19mm / 20mm / 21mm

Case size38mm / 42.5mm / 45mm

MovementETA 2824-2

Water resistance300m

References298 references

Smartlet compatibleYes

References

Covered references

20 references covered. All compatible with Smartlet.

Reference	Smartlet	Lug width	Case	Case material	Dial
SUB300T-RAR-MBLU-1973	Compatible	20mm	42.5mm	Steel	Marine Blue
SUB300-RAR-TOR-1974	Compatible	19mm	42.5mm	Steel	Tropic Orange
SUB300-RR-1974	Compatible	19mm	42.5mm	Steel	Ruby Red
SUB300T-BW-1975	Compatible	20mm	42.5mm	Steel	Blue Wave
SUB300T-CMD-1976	Compatible	20mm	42.5mm	Steel	Grey Commando
SUB200-RAR-SI-1982	Compatible	18mm	38mm	Steel	Ice Silver
SUB200-RC-OR-1983	Compatible	18mm	38mm	Steel	Orange/Black
SUB118-1955-PROT	Compatible	18mm	38mm	Stainless Steel	Black
SUB1200T-OR-2009	Compatible	20mm	42.5mm	Stainless Steel	Orange
SUB1200T-YL-2010	Compatible	20mm	42.5mm	Stainless Steel	Yellow
SUB1200T-SL-2010	Compatible	20mm	42.5mm	Stainless Steel	Silver
SUB1200T-BK-2010	Compatible	20mm	42.5mm	Stainless Steel	Black
SUB1200T-BLU-2012	Compatible	20mm	42.5mm	Stainless Steel	Blue
SUB1200T-POSE-2016	Compatible	20mm	42.5mm	Stainless Steel	Black/Yellow
SUB1200T-II-OR-2022	Compatible	20mm	42.5mm	Stainless Steel	Orange
SUB1200T-II-BK-2022	Compatible	20mm	42.5mm	Stainless Steel	Black
SUB1200T-II-BL-2023	Compatible	20mm	42.5mm	Stainless Steel	Blue
SUB1200T-II-SL-2023	Compatible	20mm	42.5mm	Stainless Steel	Silver
SUB1500T-SL-2010	Compatible	21mm	45mm	Stainless Steel	Silver
889.10.201.10	Compatible	21mm	45mm	Steel	Blue

Smartlet compatibility

The Doxa SUB 300 uses 18mm to 21mm lug widths depending on reference. Smartlet attaches via the standard spring-bar system. Zero contact with the watch case, lugs, or crystal. Fully reversible in seconds.

Compatible smartwatches

Smartwatches to pair with your SUB 300

All smartwatches below can be worn simultaneously with your SUB 300 via Smartlet.

View all compatible smartwatches →

Questions

Frequently asked

Is Smartlet compatible with the Doxa SUB 300?+

Yes. The SUB 300 uses 20mm lugs across all steel references - natively supported by Smartlet. No adapter required. The saturation valve and 300m water resistance seals are not affected.

Does Smartlet damage the SUB 300 water resistance?+

No. Smartlet uses the same spring-bar attachment as any strap change. The crown and case seals are completely untouched.

Can I use Smartlet with vintage Doxa SUB 300 references?+

Yes. Vintage references typically use 19mm or 20mm lugs - both natively supported by Smartlet. No adapter required.

Does Smartlet work with the Doxa SUB 300?+

Yes. The SUB 300 uses 19mm and 20mm lugs, both natively supported by Smartlet. No adapter required.

Will changing the strap affect the SUB 300 water resistance?+

No. Smartlet uses standard spring bars, the same as any strap change. The 300m seals are not touched.

Which SUB 300 references are compatible?+

All of them: Professional, Whitepaper, Sharkhunter, Caribbean. The 19mm and 20mm lug widths are fully covered by Smartlet.