Strap for Big Bubble Magical 52 Titanium / PVD Georges Melies / Rubber

The lug width of the Corum Bubble L390/03637 is 27mm. This dimension is determined by the distance between the case suspension lugs and requires straps specifically sized for this width. To measure it accurately, use a digital calliper positioned between the outer points of the lugs, with precision to at least one tenth of a millimetre.

For the Corum Bubble L390/03637, we recommend alligator leather in vegetable tanning, taupe grey or dark brown: the irregular grain of reptile leather creates visual balance with the audacious geometry of the sapphire dome without competing optically. Alternatively, shell cordovan in mahogany brown conveys formal elegance, or greyish vegetable-tanned calf for a contemporary approach.

To change the strap on the Corum Bubble L390/03637, use a spring bar removal tool compatible with the non-standard 27mm lugs. Position the tool tip in the rear access hole of the spring bar, apply gentle outward pressure whilst simultaneously lifting the lug from the bar. Repeat on the other side. Insert the new strap by aligning the holes correctly, then reposition the spring bars with the tool until you feel a click. Precision is crucial given the non-standard width.

Yes, Milano Straps offers bespoke 27mm straps in alligator, calf, NATO, and FKM rubber, individually crafted to the Bubble L390/03637's lug specifications. Each strap allows customisation in colour, stitching, and edge finishing. Delivery is rapid and compatible with standard spring bars.

An alligator or vegetable-tanned calf strap typically lasts 5–7 years under moderate use conditions, with regular rotation (not continuous daily wear). Factors such as humidity, sun exposure, skin perspiration, and washing frequency affect durability. A shell cordovan strap tends to last longer thanks to superior fibre resistance; NATO and rubber straps have virtually unlimited mechanical durability, though they may yellow or lose elasticity over years.