Michael,
here is a link to the
CNG website and hundreds of this
type of
drachm that they have sold in the past many years. You will need to copy and paste this entire 'link' into your browser to get to the intended
CNG webpage.
https://www.cngcoins.com/Search.aspx?PAGE_NUM=&PAGE=1&TABS_TYPE=1&CONTAINER_TYPE_ID=2&IS_ADVANCED=1&ITEM_DESC=Philip+II+Ar+Drachm&ITEM_IS_SOLD=1&SEARCH_IN_CONTAINER_TYPE_ID_1=1&SEARCH_IN_CONTAINER_TYPE_ID_3=1&SEARCH_IN_CONTAINER_TYPE_ID_2=1&SEARCH_IN_CONTAINER_TYPE_ID_4=1
Your coin has the
types of
Herakles on the
obverse (later known by the
Romans as
Hercules), and
Zeus enthroned on the
reverse. These are the
types of
Alexander the Great, son of
Philip II. In any event, I don't see your coin being a lifetime issue of
Philip II. I can't read the
inscription on your coin...if the name is Philip, then it would refer to Philip III. If it is Alexander, then this would refer to
Alexander III (the Great), but could be struck after Alexander's death by any number of entities (this
type of coin was struck for many, many years after the deaths of Philip III and
Alexander the Great). By looking at the coins on the
CNG website, you will see that the vast majority of them weigh around 4.2 to 4.3 grams, though some legitimate examples do weigh only 4 grams. The pits on your coin are cause for concern, as previously mentioned, as this is often a sign of a
plated coin (maybe even an ancient
counterfeit). However, your coin might also be authentic and just exhibiting pits, as some
ancient coins do. Among the
CNG examples linked to, you will find a very few lifetime examples of
Philip II, so you can see what
type of devices were used on
his drachms. You will also see that the lifetime drachms of
Philip II are usually struck on a different and lower
weight standard (your coin would be a
bit too heavy to be one of these).
Celtic imitations are something I know next to nothing about, but perhaps this is a possibility as well.