Help ID Ancien Gold Coins

One of the most faked of all ancient coins, even in high quality gold. Fakes are often made from modern melted gold coins.
As you can see, the same type as my avatar.

My example came from Spinks (London) in 1978. I still have all of the polaroid photographs and purchase paper documentation, to prove provenance. Essential to keep these records.

Weight is right, diameter is right, style OK,
but if I were to buy them, I would need to
1. have it checked with an XRF instrument,
looking for trace elements, not gold.
2. I would also seek a corroborative opinion of an ancient coin auctioneer specialist, and
3. have an independently proven provenance.

Fortunately, I have had access to XRF, and professional ancient coin auctioneer experience for many years.

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The obverses of these two pieces look suspiciously shiny.

The British Museum has done some extensive and detailed destructive testing in relation to the proportion of trace metals found in various ancient gold coins.

I feel sure that if these were coins were submitted for XRF testing to the British Museum, they could compare the proportion of trace metals found in XRF testing, with their previous research findings.
Some of the major coin dealers that have a respected international reputation, should also have access to the British museum research findings.

At least, you should get an authoritative opinion about these two coins, that you may submit.

From my quick research, I think the detailing on the hair and laurel leaves is probably enough to condemn both as jewler's copies - hopefully struck in solid gold and not plated lead.

I am very doubtful about the hair of both obverse and about the head of the horses on the reverse : the style doesn't look genuine to me. But I am not a specialist, you need in any case to look for an authoritative assessment.