HB 675
Description
The german manufactury Hermann Becker (HB) of Pforzheim, was especially in the 1950ies famous for their water resistant watch cases, as well as for mens' watch movements like the HB 115.
Among the few ladies' watch movements, which are pretty rare and hard to find, there’s the caliber HB 675 described here, which has got a very special shape.
Video on YouTube
Gears and trains
It is a true pallet lever movement, which has got a slowly beating (18000 A/h) Glucydur screw balance, which is beared in two Super-Shock-Resist-bearings.
side view of the gears
The construction is the same, as on other tiny ladies' watch movements, with small and overlapping gears. Only the mainspring and balance are rather big because of the dimensions of the movement.
main plate
The shape of the movement it that, of a round 5 1/4 ligne movement, which is extended on the top and on the botton for more space for a larger balance wheel and mainspring barrel.
dial side
The specimen shown here has got the old shape of the setting lever spring.
In the lab
Timegrapher result
In the horizontal positions, the movement performs rather well, but vertically, the rates are really bad.
crown right (12 up)
crown up (3 up)
crown left (6 up)
crown down (9 up)
dial up
dial down
| horizontal positions | |
|---|---|
| dial up | -30 s/d |
| dial down | +15 s/d |
| vertical positions | |
| crown right (12 up) | -210 s/d |
| crown up (3 up) | -320 s/d |
| crown left (6 up) | -32 s/d |
| crown down (9 up) | -145 s/d |
Technical data
| Manufacturer: | HB |
| Caliber: | 675 |
| Size: | 5 1/4 x 8 3/4''' (measured: 15,1 x 19,8mm) |
| A/h: | 18000 |
| Number of jewels: | 15 |
| Escapement: | Pallet lever |
| Balance types: |
Glucydur screw balance |
| Shock protection(s): |
Super Shock Resist |
| Balance bearing / direction hairspring: | Counterclockwise |
| Moveable stud: | no |
| Adjust mechanism: | Long regulator arm |
| Construction: |
|
| Construction type: | solid construction |
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 4 hole(s) |
| References: |
Flume: 1952 33 |
| Mentioning in literature (years): | 1951 |
Usage gallery
Anker ladies' watch