Based on the ETA Thermoline 988.352 the B75 was a thermo-compensated high accuracy quartz movement that was capable of keeping time to +- 10 seconds a year. These watches started to hit the market
link around 2001 and though they represent one of the more costly options in the lineage that is laid out above not counting gold models they offer the most advanced execution of an
link Aerospace to date and if you care deeply for accuracy
link this is the reference to look for.
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