プラスチックアナログ時計の開発 (1984年春季講演会)

概要

論文の詳細を見る
Using plastic instead of metal for the material of parts is effective to improve the productivity of watch movements. Thus, we tried to use the engineering plastic for watch parts as many as possible, and developed an analog quartz watch using the plastic for the main plate, the train wheel bridge, the circuit holder, the rotor, wheel No.5, and the minute wheel. This is marketed as Cal. Y12. The Y12 offers a better assembly yield and is superior to the former calibers in such qualities as durability and shock-resistance.
社団法人日本時計学会の論文
1984-12-20