Mesi is a villiage located in the Nomos Imathia in Northern Greece:
Here's a picture of the weapons:
Thanks. I don’t think that is 500 miles from Athens. Imathia is ancient Emathia (the first vowel is an eta, accent on the “thi”). It looks like it is near the Haliacmon (Aliakmon) River in southern Macedonia (that’s the river visible on the map as flowing towards Mesi from the direction of 7 o’clock), maybe not far from Beroea.