Harlan J Berk on vcoins.com 

Caligula and Augustus, Aureus

37-41 AD, Aureus, Lugdunum, 37-8 AD, 7.67g. BM-16, Paris-17, C-1 (150 Fr.), RIC-15 (R2), Calicó-332. Obv: C CAESAR AVG 
GERM P M TR POT Laureate head of Caligula r. Rx: DIVVS AVG PATER PATRIAE Radiate head of Divus Augustus r. The same 
obverse die was also used on an aureus with reverse Bust of 
Agrippina I, Giard, Lyon (1983), pl. XL, 168/12a. 
Beautifully centered. Bold fine

Price
  US$ 24,000.00 	 euro 17,368.88
 £ 11,659.18
 CHF 28,933.44
 CAD$ 25,082.40
Rates for 7/24/2007