Lot
464 
Switzerland, Airmail, 1935, 10c on 15c Disarmament Conference, inverted surcharge, o.g., never hinged, exceptional centering bright and fresh, Extremely Fine, very rare with only 50 examples issues. Zumstein No. 20.1.09.Scott No. C20a $6,500 for hinged.
A CHOICE NEVER HINGED EXAMPLE OF THE 1935 10C ON 15C DISARMAMENT CONFERENCE AIRMAIL ISSUE WITH SURCHARGE INVERTED.