Timex M72
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| Timex M72 |
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The Timex caliber M72 is the oldest 21 jewel movement, made by Timex.
It was introduced in 1961.
In contrast to "normal" 21 jewel movements, on this caliber, only the
axes of the gears were pivoted in jewels, the balance was still
pivoted in brass pivots.
This hybrid of a cheap non-jeweled and a "good" fully jewels watch
was better than a non-jeweled watch, but far below a good swiss
fully jeweled movement.
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| unusual: pin lever with jewels |
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As you can see, most bearings were covered by deck jewels, which were
bordered in a kind of chaton. These deck jewels are, maybe except the
anchor wheels' deck jewel, not really needed, but they helped to
reach the high number of 21 jewels. Maybe, Timex hoped, that their
"21 jewels" watches were seen superior to generic (but nevertheless
technically advanced) "17 jewels" watches.
Since Timex watches were always regarded as rather cheap watches, the
expensive "Timex 21" models did not sell that good and in the early 1970ies,
they disappeared from the scene. A certain collectors value cannot be
denied, though.
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| dial side |
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| Manufacturer | Timex |
| Caliber | M72 |
| Number of jewels | 21 |
| Escapement | pin lever |
| Balance | Nickel |
| Shock protection(s) | none |
| Balance cock direction | centered (bridge) |
| Hairspring stud | fixed |
| Regulator type | Hairspring key |
| Movement construction | Fork, Escapement wheel, Fourth wheel, Third wheel, Large driving wheel, Mainspring barrel |
| Features | SCD |
| Functions | Hour, minute, second |
| Beats per hour | 18000 |
| Production time | 1961-~1970 |
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| Factsheet |
Usage gallery
