Gents I am seeking some advise from the collective here. Hypothetically if you were offered a Tag Heuer Spirotechnique as part of a trade deal what would you say was a fair value on which you could judge the decision? The watch in question is in very good overall condition and comes with an original although damaged blue Heuer box. These Spirotechniques are indeed rare and seldom come to market and I am struggling to place a value on it.