Repairs made. Cleaned; polished pivots and new mainspring fitted. The first position test showed a variation of nineteen seconds as per second column, Fig. 18.
It will be noted that this example differs from Nos. 1 and 2, in that the rate is slow in the pendant up position. Examination showed all points satisfactory except that the regulator pins were spread considerably and allowed too much freedom of vibration for the coil.
Had this vibration been slight it would have been advisable to examine the poise. As it was considerable, however, the alteration made was to close the pins so that only slight vibration was visible with a strong glass.
+--------------------------------------------------+ | No. _7457488_ Make _Elgin_ | +--------+-----+-----+-----+-----+-----+-----+-----+ | D U | - 9 | - 9 | + 5 | + 5 | | | P | +--------+-----+-----+-----+-----+-----+-----+ | | D D | -18 | - 9 | + 8 | + 3 | | | | +--------+-----+-----+-----+-----+-----+-----+ | | P U | -46 | -28 | + 9 | + 1 | | | | +--------+-----+-----+-----+-----+-----+-----+-----+ 19 4
This watch was not equipped with mean time screws and it was therefore necessary to fit a pair of thin timing washers because closing the pins caused a gaining rate of two seconds per hour in the mean time. The next position test showed a variation of four seconds as per fourth column Fig. 18.
The time consumed in making the alteration and fitting the washers was about ten minutes.
Hampden No. 1438676, Open Face, 21 Jewels.
Repairs made. New balance staff and hole jewel fitted and cleaned.
The first position test showed a variation of twelve seconds slow pendant up as per second column Fig. 19.
+--------------------------------------------------+ | No. _1438676_ Make _Hampden | +--------+-----+-----+-----+-----+-----+-----+-----+ | D U | + 2 | + 2 | + 2 | + 2 | | | P | +--------+-----+-----+-----+-----+-----+-----+ | | D D | + 4 | + 2 | + 6 | + 4 | | | | +--------+-----+-----+-----+-----+-----+-----+ | | P U | - 6 | -10 | + 9 | + 3 | | | | +--------+-----+-----+-----+-----+-----+-----+-----+ 12 2
Investigation found all points such as balance true, hairspring true, level and circle and the regulator pins reasonably satisfactory. The motion, however, was not as good as it should have been when the spring was nearly wound up. It was let down to where it would ordinarily be after about twenty-hours run and found to have barely one turn pendant up and a trifle over one turn in the flat positions. This proved that the motion was not satisfactory for a watch that had just been put in order and all pivots were examined for close end or side shake; they were found to be satisfactory and the mainspring was removed for examination and found to be somewhat set and about 0.01 mm. thinner than those generally used for this grade watch. A new mainspring was fitted and the motion was improved by about one-fourth of a turn and the next position test showed a variation of two seconds as per fourth column Fig. 19. The time consumed in examination and changing the mainspring was about twenty-five minutes.