watches

complications
date ¹ - display the current date on the dial
GMT ¹ - second timezone
chronograph ¹ - stopwatch function
power reserve ¹ - how long a fully wound watch will run before stopping
simple ² - only date (monthly reset)
annual calendar ² - adjusts for 30/31 days (reset every feb)
perpetual ² - accounts for leap years (no reset needed until 2100)
tourbillon ³ - rotating escapement cage
minute repeater ³ - chimes the current time on demand
rattraparte ³ - "split seconds" chronograph that tracks 2 events at once (rattraper = "catch up" in French)
moon phase ⁴ - displays the current moon phase (e.g. full moon, waxing, waning)
equation of time ⁴ - diff between "mean" and "solar" time (clock vs sun, ±15 min)
jumping hour ⁵ - digital-style hour window
retrograde ⁵ - hard snaps back to start after reaching end of scale

watchlist
rolex datejust 16014 (1977-1988) | ¹
otsuka lotec no.6 (2024) | ⁵
paul newman daytona 6262/6263 (70's-80's) | ³
pre-daytona rolex 6238 (1962–1969) | ³
patek philippe calatrava 3509 (stainless steel) (1960–1968) | ¹
patek philippe perpetual calendar chronograph 3970eg (e = waterproof, g = white gold) (1986-2004) | ² ³
seiko sportura kinetic chronograph slq011j1 / slq007 (1999–2007) | ¹ ³
rolex cellini 4108 (wood dial) (70's-80's) | ¹
cartier pasha c 2324 (1995-2008) | ¹
breguet perpetual calendar equation of time 3477 (2000's-) | ² ⁴
cartier rotonde de cartier flying tourbillon w1556216 (2010's-) | ³
alexander shorokohff swan lake (alarm watch) (2010's-) | ¹ ⁵
ludovic ballouard upside down (2010's-) | ⁵
vacheron constantin patrimony retrograde day-date 86020/000g-9508 (2007-) | ²
jaeger-lecoultre master eight days perpetual q161642a (2000's-) | ²
a. lange & söhne 1815 up/down 234.026 (2013-) | ¹
bulgari octo finissimo sketch 103673 (2023) | ¹

¹ core use case
² calendar family
³ horological flex
⁴ astronomy/poetry
⁵ experimental/niche

learning about watch complications and time pieces.