Uncertain id on TROAS? AE16

[Connect4]

Help please with this, to my eye, unusual coin,
This looks like a TROAS AE16.
Obv. Helmeted head of Apollo? Right. Rev. Horse grazing right, monogram below and ΩEΛ above. Noticeably thick at 4.7mm. 
5.4gr, 15.4-16.0mm, 4.7mm thick & axis 12hr
The head Apollo may be helmeted and there may by another monogram between the rear legs and perhaps palm before?
A full id would be appreciated.
Thanks

[Pekka K]

Reverse reads: 

So you should look for Pella: https://www.acsearch.info/search.html?id=8664905

Pekka K

[Connect4]

Thanks Pekka K exact.  My one is a minor variation.