Siffert Autavia 1163T serial 14x October 17, 2015 by 24Heuer Beautiful example of a 14x serial number Siffert.Original Heuer wooden box with velvet insert, ’69 bracelet, hang tag and corfam strap with ‘sun’ buckle……Question of the day has to be – ‘why on earth did I sell it???!!!!’ 🙂