AE19 Gadara Decápolis - Please Help

[mdelvalle]

Hi, Time ago requested help with this coin, but we could not attribute it. Today I am for sure it is of Gadara Decapolis (Gilead)  
 
"Then the whole multitude of the country of the Gadarenes round about besought him to depart from them" (Luke 8:37)  
 
AE19 of Gadara (Biblical Gilead)  
Obverse: turreted bust of Tyche facing right  
Reverse: city name GADAPEWN - - - (in Greek) around a cornucopia, dated (AD 57?)  
 
Please. is somebody able to give me some catalog reference?, date?.  

[esnible]

Lindgren & Kovacs 2205, that coin 4.24g.  Citing Spijkerman 7.  Lindgren & Kovacs doesn't give dates (the Europe and III volumes do).

Historia Numorum, page 787:
http://www.snible.org/coins/hn/syria.html#Gadara
Says "Autonomous AE First century BC".  Says there is a specimen in the BM with date 18, and that the city's era began in 64 BC.  So that means the BM specimen struck around 46 BC.

[mdelvalle]

Muchas Gracias, Esnible.  
Mario

[curtislclay]

Yours seems to be a new date, LEI = year 15 = 50/49 BC.
The dates listed by Spijkerman for this type are
LIH = 18
LK = 20
KA = 21
LEK = 25.

[mdelvalle]

Sorry Curtis, this means that the coin should attribute it as unpublished?.    
In ANS, does it figure as SNGANS.6.1287/1288/1289/1290, All they have the same description, how can I know which is?  
Gracias
Mario