Strap for Engineer Master II Diver Worldtime

The lug width of the Ball Watch Engineer II DG2022A-SAJ-BK is 20 millimetres. This measurement indicates the distance between the lugs where the strap attachments are positioned. To verify, use a digital calliper perpendicularly across the lugs: the reading must be precisely 20mm. This dimension restricts compatibility to straps specifically manufactured for this specification.

For this reference with a robust 47.60mm case, we recommend alligator in black or anthracite grey, offering elegance and structure proportionate to the instrument's weight. Alternatively, vegetable-tanned calf develops a natural patina over time. For intensive use and outdoor environments, a charcoal NATO canvas strap embodies the original tool-watch vocation. FKM rubber is ideal for diving and humid conditions.

The DG2022A-SAJ-BK features threaded lugs: use a specialised tool (spring bar removal tool with threaded slot) to gently unscrew the lugs from the case. Rotate counterclockwise until the lug detaches completely. Remove the old strap and insert the new one, aligning the holes with the lugs, then screw clockwise with moderate pressure. Do not force: the movement should be smooth. Verify that the strap does not protrude beyond the case margins.

Yes, any artisanal strap of quality construction manufactured with 20mm lug width is compatible with the DG2022A-SAJ-BK. However, given the case's substantial mass (approximately 180 grams), we recommend straps with a minimum thickness of 3.5-4mm in the sections beneath the crown and a rigid structure that properly supports the piece. Undersized or excessively flexible straps will compromise ergonomic comfort.

A quality artisanal leather strap (alligator, calf, shell cordovan) worn daily has an expected lifespan of 4–6 years under normal conditions. Longevity depends on frequency of use, climatic conditions (humidity shortens life) and maintenance. Vegetable-tanned leather ages more elegantly; chrome-tanned leather resists humidity better. Investing in superior leather quality pays dividends in both durability and aesthetic evolution.