Kingdom of Bosporos Stater - help with date

So far my bids in 2019 have all failed - time to explore a coin that has been sitting unexplored - purchased on EBay quite a few years ago - the slight gold color on the surface also intriguing. This 7.2g 20.3mm stater is the only silver coin I have from the Kingdom of Bosporus - I am having trouble matching up with anything I can find online in detail : dates, K instead of I on the reverse, trident or not on the obverse...here's my best guess but could easily go Rheskuporis V.

Rheskuporis IV, Billon Stater
Obv: BΛCIΛEωC ΠHCKOΠoRIK, Rheskuporis' laureate draped bust right
Rev: Laureate draped bust of Gallienus right, I to right, date ΛΚΦ below.

Date = ΛΚΦ 20+30+500 = 550 or AD 253? Λ(X or Ξ)Φ?

Any suggestions and advice on attribution, and pointers to useful reference information on this coin+history are all much appreciated.

and a closeup of obverse surface to highlight the color

 

Log in or Sign up to hide this ad.

I think the year is AMΦ = 541 = 244/245 BC. Differentiator on obv.: club. Then it would be MacDonald 603; Anokhin 602; Stanislavskii 640

I use David MacDonald, An Introduction to the History and Coinage of the Kingdom of the Bosporus, 2005

Best regards

 

Thank you @Jochen

KINGS of BOSPORUS
Rhescuporis IV, with Philip I circa AD 242/3-276/7.
Billion Stater (20.3mm, 7.2 g).
Date: Bosporan Era 540 (AD 243/4)
Obv: BΛCIΛEωC ΠHCKOΠoRIK Diademed and draped bust of Rheskouporis IV right
Rev: Laureate and draped bust of Philip I right; club before, AMΦ (date) below.
Ref: MacDonald 602; Anokhin 691; Stanislavskii 640

Example from ACSearch: https://www.acsearch.info/image.html?id=1337222

 

As a rule, dates should contain one digit at a maximum from each group 1-9, 10-90 and 100-900. An A missing the cross bar is nothing to worry about. The one that we modern Westerners have trouble with is the lack of a zero so the two digit MΦ is one year before AMΦ. This is worse when you get a zero in the middle position. I don't have an example of this to show. Anyone?

 

Thank you @dougsmit - here's nice AV Stater of Sauromates I, with Trajan on ACSearch that illustrates the missing10s: Date=ZY=7+400=Bosporan Era 407=AD 110.

 

Here is my recent win from Triton XXII
Eupator with Marcus Aurelius/ Lucius Verus
Dated BE (ONV) =459 161/2AD
AV Stater 60%AV 40AR
By 260AD the Staters where billon=debasement

 

Wonderful, congrats!

 

Thanks @panzerman - new to CT it has not taken long to expect you to share amazing coins. The one above does not disappoint!