Chondrite meteorite
Kesen
Also called Okirai-Kesen (Louis Moinet marketing name)
A witnessed Japanese chondrite fall. Louis Moinet calls the material Okirai-Kesen, but the Meteoritical Society’s official name is Kesen.
The specimen
- Classification
- H4 ordinary chondrite
- Event
- observed fall
- Where
- Kesen district, present-day Iwate Prefecture, Tohoku, Japan
- When it fell
- 1850-06-13
- Found
- 1850
- Known mass
- 135 kg
- Still cut for dials
- Yes (as of 2026-08-21)
The Japan Meteorite limited edition remains on the maker’s current catalogue page.
Watches
No watch in this catalog is recorded as carrying a Kesen dial yet. The models below are what the research documents.
- Louis Moinet Japan MeteoriteInset fragment
Cosmic Art
LM-85.20.JP
meteorite dial material/inlay
Source
Sources
- louismoinet.com — Louis Moinet meteorite-watch cataloguemarketing alias, model and exact reference
- lpi.usra.edu — Meteoritical Bulletin Japan searchfall status and regional listing
- Meteoritical Bulletin Database — Kesenofficial name, observed fall, 1850, Japan, H4 and 135 kg mass