Watch List notes:

SWITZERLAND. Celtic. Helvetii. Gold Stater imitating type of Philipp II, 2nd century BC. Obv. Laureate head of Apollo right. Rev. ΦΙΛΛΠΠΟΥ. Biga driven right, small head (?) under the forelegs. HMZ 1-1b; LT 4837 var. AU. 8.39 g. VF-XF
A similar coin sold at Sincona in 2014 for 4200 CHF.