
Given that on yours below left claw of eagle is C letter it should be
KM# 1855 under Austria.
http://www.ngccoin.com/poplookup/world-coin-prices.aspx?category=63313&worldcoinid=173899&FromSearch=true
as 1770 is listed as C-K on there, with K being under right claw. A KM# 1862 is AS letters so is not that.
AUSTRIA 10 Kreuzer KM# 1855 1768-1780
1770 C-K
Composition: Silver
Fineness: 0.5
Weight: 3.8900g
ASW: 0.0625oz
Obverse: Draped bust right within wreath of palm and laurel
Obverse Legend: M THERESIA D: G R IMP HU BO REG
Reverse: Crowned imperial double eagle with arms on breast atop pedestal
Reverse Legend: ARCHID AUST DUX BURG CO TYR
Ruler: Maria Theresa
Note: Prev. KM#1948.