This is the state-of-the-art technology developed by Japanese SMEs.
At the MOBIO Tech Hall and MOBIO WEB site, search for "The Latest Made in Japan Tech" to improve product features and functions.
YAMAZEN MOLD CO.,LTD.:https://www.m-osaka.com/en/exhibitors/526/
A YAMAZEN's metal calendar can be used for many years by replacing parts. Many of the commitments put into making the parts are cultivated in precision mold manufacturing.
The surface is beautifully mirror-polished with a surface roughness of 5μ. And the parts of day, day of the week, month and year are engraved by the electric discharge machine. The tolerance between the character piece and the pocket of the calendar is the result of the craftsmanship.
Please see the hidden techniques for inserting parts smoothly without any resistance.
At the booth on the 2nd floor of the MOBIO Tech Hall, YAMAZEN displays a metal calendar with inserted date pieces.