I hesitated to post this Greek coin which has Tyche on the obverse. Actually its worn condition hindered me from identifying the reverse, wondering myself whether if it's a cista mystica or anything interesting else?
Hmm, I don't think it's a cista. Phoenicia issued a ton of bronzes with Tyche obverse. Although the reverse figure is difficult to make out, perhaps it is a prow? That's a commonly seen reverse for Phoenician bronzes. Try browsing all of the Phoenician cities on Wildwinds.
I think your obverse has a legend, unlike the various Phoenician bronzes with Tyche obverse. There also appear to be letters under the thing on the reverse. Maybe the reverse is an altar, perhaps something like this CNG coin: Sale: CNG 61, Lot: 311. Estimate $100. Closing Date: Wednesday, 25 September 2002. Sold For $60. This amount does not include the buyer’s fee. SYRIA, Seleukeia Pieria. Antiochia ad Orontem. Circa 65-66 AD. Æ 18mm (6.43 gm). Veiled and turreted head of Tyche right / Lighted circular altar on legs; ET DIP. BMC Galatia, etc. pg. 161, 85 ... This looks like a strong possibility, although it would help if you can read the obverse legend. Maybe there are similar coins from other Syrian localities.
Apparently TIF has a wee bit more ummmphhf than me?!! ... she is pretty cool (I get an "F" on this assignment)