Positions: Testing Accuracy Properly
Author: Funny Items
Release time: 2026-08-26 03:43:12
View number: 21
Position Testing Protocol
Mechanical watches rate differently depending on orientation — gravity affects the balance wheel. Here is a systematic testing protocol.
The Five Standard Positions
- Dial up (DU) — face toward ceiling
- Dial down (DD) — face toward floor
- Crown up (CU) — 12 o'clock pointing up
- Crown down (CD) — 12 o'clock pointing down
- Crown left (CL) — crown at 9 o'clock position
Testing Procedure
- Fully wind the movement first
- Place in each position on a soft surface; let settle 10 minutes before reading
- Record rate per position via timegrapher or phone app (see our app guide)
- Calculate spread: fastest minus slowest position
Reading Results
| Spread | Assessment |
|---|---|
| Under 15 sec/day | Excellent positional stability |
| 15–30 sec/day | Normal for accessible movements |
| Over 40 sec/day | Regulation opportunity or service need |
Exploiting Variance
If your watch runs +5 DU but -5 CD, storing it crown-down overnight averages daily drift toward zero. Enthusiasts call this "position compensation." See our troubleshooting guide for the full diagnostic flow.
Frequently Asked Questions
Which position matches wearing?
None exactly — wrist wear constantly shifts. But your dominant storage position matters most for overnight drift.