Ball Watch Engineer M NM2128C-S4C-BK
The Ball Watch Engineer M NM2128C-S4C-BK takes a 21 mm watch band.

Ball Watch · Engineer M
- Lug width
- 21 mm
- Reference
- NM2128C-S4C-BK
- Family
- Engineer M
- Model
- Engineer M NM2128C-S4C-BK
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Sizing notes
- Any 21 mm band fits this reference, in leather, rubber or fabric.
- 21 mm is an odd size: most ready-made bands are made in even widths, so this reference needs one cut to measure or a band that runs in odd sizes. Why some watches take odd sizes →
- Inside the Engineer M family the lug width is not one number: it runs 20, 21, 22 mm. This reference is the 21 mm one, so a band bought for another Engineer M may not fit it. Why the size changes inside a family →
- 21 mm is not a common size: only 2,956 of the 41,485 watches measured take it (7.1%), so ready-made choice at this width is narrower than at 20 or 22 mm. Every watch that takes 21 mm →
Other Engineer M references
- Engineer M DD3100A-S2C-BEDD3100A-S2C-BE
22 mm - Engineer M ND2186C-L1C-BEND2186C-L1C-BE
21 mm - Engineer M ND2186C-L1C-BKND2186C-L1C-BK
21 mm - Engineer M NM2032C-S2C-BKNM2032C-S2C-BK
20 mm - Engineer M NM2128C-SCA-BENM2128C-SCA-BE
21 mm - Engineer M NM2128C-SCA-BKNM2128C-SCA-BK
21 mm
Same lug width, other Ball Watch lines
- Engineer III Ball Engineer III Marvelight Chronometer (43mm)Ball Ball Engineer III Marvelight Chronometer (43mm)
21 mm - Engineer Hydrocarbon DM2276A-S3CJ-BKDM2276A-S3CJ-BK
21 mm - Engineer Master II DM2280A-S6-BKDM2280A-S6-BK
21 mm - Engineer Master II DM2280A-S6C-BKDM2280A-S6C-BK
21 mm - Engineer Hydrocarbon DM3200A-S1C-BKDM3200A-S1C-BK
21 mm - Engineer Hydrocarbon AeroGMT II MeteoriteEngineer Hydrocarbon AeroGMT II Meteorite
21 mm
Hammered Black Calfskin Strap — Ecru Stitching
Brown Italian Leather Strap
Black Saffiano Strap Ecru Stitching
Vintage Brown Calfskin Strap — Natural Patina
Swift Topo Leather Strap
Matte Red Caiman Latirostris Strap — Hand Stitched