MovementSwap guides
Practical guides to measuring, sizing and choosing the right part, from the same sourced data behind the fitment tool.
How to Measure a Watch Movement (Lignes and Millimetres)Watch movements are sized in lignes and millimetres. One ligne is 2.2558mm. How to read diETA 2824-2 vs Sellita SW200-1: Are They InterchangeableThe Sellita SW200-1 was cloned from the ETA 2824-2 and is a near drop-in: same footprint,What Makes a Movement a Drop-In ReplacementA drop-in swap needs matching diameter, height, stem position and height, hand sizes, dialMiyota 8215 vs 9015The Miyota 8215 runs at 21,600 bph, is non-hacking and about 5.67mm high; the 9015 hacks,Seiko NH35 vs NH36The Seiko NH35 and NH36 share a footprint of about 27.4mm and hack; the NH35 shows a date,Swapping a Quartz Ronda for an Automatic: What to CheckGoing from a Ronda quartz to a mechanical movement changes height, stem position, hand sizETA 2892 vs 2824: Which Is ThinnerThe ETA 2892-A2 is the thinner movement at about 3.6mm high against the 2824-2 at about 4.