Orient Star Retro-Future Bicycle Watch

The Hinomatic and the T-S Type Movement

now going back in time to the earliest documented history of Orient. We know
some facts about its incorporation – how it launched as Tama Keiki Co. in 1950,
and was renamed Orient a year later and launched its first "Orient
Star" model – But there's very little record of the factory's watchmaking
activity between then and 1955.

in 1955, Orient launched its first documented in-house designed movement, the
"T-S Type": a hand-winding, central seconds, 18,000 BPH caliber.

We do
know it was not 100% made in-house, as some of the parts could not be manufactured
by Orient at that time – it took two more years for Orient to accomplish the
finishing of some of the finer parts of the mechanism. And obviously the design
borrowed from an existing movement (I believe one by Citizen).

of the interesting features of the "T-S" type was its hacking
mechanism. This was not a very common feature at the time, and it seems its
implementation by Orient had not been perfect.

when the second-hacking mechanism is engaged, it puts a sudden stop to the
movement of the second hand, which can cause the balance wheel to stop abruptly
as well. This sudden stop can cause additional wear and tear on the watch
movement, especially if it's done repeatedly or incorrectly.
Possibly, the "T-S" was not properly designed to withstand the
additional stress caused by the second-hacking mechanism. Ultimately, many
watchmakers removed the hacking mechanism when the "T-S" was brought in
for repair.

the movement was good enough to form the basis for the brand's new watch, the
"Orient Star Hinomatic". It was not, of course, automatic – all
Orients at the time were purely hand-winding machines – but it was manufactured
at the brand's Hino factory in Japan. And it also became the brand's first
export, as Hinomatics began selling in China.

that while some sources mentioned the Hinomatic as the first central-second
Orient, it was in fact preceded by the Orient Star Center-Second (that used a
non-Orient movement).

Hinomatic Sports was produced in a number of versions until 1957, when the T-S
type was replaced by the improved T type movement that spawned an abundance of
new models. But – that would be the topic of a new post…


that appear in this post were taken from
the 1999 Orient Watch Catalog book, and old Orient sale