Concerns about rare MSC showing signs of casting, insights and opinions appreciated

At 1.6 gr, 12 mm this coin is considerably underweight compared to the two other examples I found on ac search coming in at 4.43 & 4.09. Though, at twelve mm I believe it to be a quarter unit and not a half.
The weighty issue aside, I really don't like the pimples on the reverse. Sure looks like signs of casting to me:


Time of Philip V and Perseus. 187-168 BC. Æ Thessalonika mint, under Amphaxitis. Macedonian shield with monogram of Macedon in central boss / Macedonian helmet; monograms around. Touratsoglou, Macedonia -; AMNG III 20; Draganov 808 var

Ancient collectors and experts thoughts are appreciated

 

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...oh, its got some pock marks going on on the reverse..but i don't think its cast...

 

Difficult to be positive w/o a better focused picture.

 

Little coins=big pain to photograph.
Here is another view:

 

If this was offered to me at a fair price or even below a fair price I would not buy it.

Look on the edge of the coin. Many casts have an area where the medal is injected or a seam from the mold. This must be concealed, often leaving file marks. On better fakes the marks are hammered "spooned" out. Under magnification, most genuine ancients have fissures on their edge from striking.

Deceptive counterfeits have not been made by casting for many decades. The pimples you see may have been defects in the C/F die.

PS The "weight issue" should never be put aside.

 

Ryro, I'm not an expert but this coin make me nervous ....

 

All good advice and appreciated! I knew about the filing being an issue but hadn't seen (or noticed) the spooning. Yikes!
And agree the weight is a big concern as well, but hoping maybe it was due to it being a 1/4 instead of 1/2 unit.
And thanks to all the responses. I think it's safe to say this is not going to be joining my MSC collection.