This is a nice early Jumbo Tissot Antimagnetique. The diameter is 38 mm without the crown.
Early Tissot watches, including the Antimagnetique, came with all kinds of evolutions of the Tissot 27, but this one has the base caliber.
The serial number is 1010496 and that dates this watch to 1938 or 1939.
This Tissot needed a service because it was a couple minutes fast, with the regulator in the middle position. It also needed a new crystal and a new crown.
Forgive me for the broken watch strap that is also too small.
Another Tissot Antimagnetique on WahaWatches. This one with the base caliber, the Tissot 27.
The serial number is 2268680 and that dates this watch to 1949. One of the very last of this caliber to be made.
This Tissot needed a service because it was gaining time and the amplitude was (very ) low. It also needed the crown replaced. The minute hand had lost most of the lume and the hour hand was getting critical as well.
With the approval of the owner, I relumed the hands.
This time a Tissot Antimagnetique on the bench. It’s rather large for a vintage, 35.5 mm without the crown. It did run but it didn’t keep time and the amplitude was very low. It needed a new crystal as well and the hands were in a sorry state.
The minute hand had lost some lume in the tip and the hour hand had lost almost all the lume. Normally, I like to stay away from the dial and the hands. In this case, though, the hands had lost too much lume in my opinion and I preferred to re-lume them. The owner agreed with me.
The movement is a Tissot 27-1T. The serial number is 2640999 which places it in 1952.
Magnetic fields are an issue known all too well to watch aficionados.
They make quartz movements go haywire. They cause the hairspring of a mechanical movement to stick to itself, causing the watch to run fast beyond measure.
Even in the 19th century, great manufacturers like Patek Philippe tried to use hairsprings made of metals less susceptible to magnetism and experimented with various alloys.
But here, we’re talking about high-end manufacturers. What about the affordable brands?
Well, that’s where it gets interesting.