Very rare Omega flightmaster 145013 cal 910 special for pilot and produced two years only . Sn 29134908 dated 1970 . Original first version production tropical dial ( A5. 12 With Dots) w GMT function and original 1159 bracelet. Non polish case . W Omega Extract of the Archive showed made in 1970 and matched w production dial. Accurate and all function works good . Watch only w copy of instruction manual too .

If want to have deeply insight on flightmaster pls read carefully the attachment especially final one

https://www.fratellowatches.com/omega-flightmaster-910-ode-to-an-icon/

https://thechronoduo.co.uk/watches/omega-flightmaster-145-013-cal-910/

https://m.discuss.com.hk/index.php?action=thread&tid=22219623

https://monochrome-watches.com/in-depth-the-omega-flightmaster-the-special-one/

https://www.watchfid.com/understanding-the-flightmaster-pre-series/