Service Bulletin Released
In order to inform horologists of the characteristics of the new 15/0 size Elgin movements, the Elgin National Watch Company has published a service bulletin which has been distributed to the trade. Since these new movements contain a number of new features, horologists should lose no time in becoming familiar with them.
Of prime significance is the new solid balance and self-compensating hairspring.
The Beryl-X balance, as it is called, is made from a heat treated alloy, which has the required characteristics of resistance to distortion, stiffness and wear. Both Beryl-X and Elginium, the alloy from which the hairsprings are made, are nonrusting and non-magnetic. Either the balance or hairspring of this combination may be replaced without altering the temperature adjustment.
A new type of balance staff with a grooved hub greatly simplifies the replacement of a broken or damaged staff. The barrel assembly has a new design and the mainspring is provided with a new brace. The unit will drive the watch for 40 hours with one winding, thus providing a more uniform balance motion.
The jeweling has also been improved and it is now possible to clean the watch without removing the balance hole jewels from the plate and bridge. Another feature is the coarser screw threads, to prevent overturning.
The bulletin is well illustrated and shows the proper methods of replacing a balance staff and jewels as well as tightening jewel settings and replacing hands.
Of prime significance is the new solid balance and self-compensating hairspring.
The Beryl-X balance, as it is called, is made from a heat treated alloy, which has the required characteristics of resistance to distortion, stiffness and wear. Both Beryl-X and Elginium, the alloy from which the hairsprings are made, are nonrusting and non-magnetic. Either the balance or hairspring of this combination may be replaced without altering the temperature adjustment.
A new type of balance staff with a grooved hub greatly simplifies the replacement of a broken or damaged staff. The barrel assembly has a new design and the mainspring is provided with a new brace. The unit will drive the watch for 40 hours with one winding, thus providing a more uniform balance motion.
The jeweling has also been improved and it is now possible to clean the watch without removing the balance hole jewels from the plate and bridge. Another feature is the coarser screw threads, to prevent overturning.
The bulletin is well illustrated and shows the proper methods of replacing a balance staff and jewels as well as tightening jewel settings and replacing hands.
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