Unsure of hallmark; does it say different things

[populous38]

Good evening; I wonder if anyone can help? This chain is marked both 18K, 1 AR and 333. 333 and 18K on disk and 333 on clasp. I think 333 is 8 ct but it is also clearly stamped 18K. I haven't tested it. Is that the only way. I also wondered if anyone recognised the symbols.
Appreciated as ever.
Gary

[dognose]

Hi Gary,

See Unoaerre at: viewtopic.php?f=38&t=27003&p=66562&hilit=UNOAERRE#p66562

Trev.

[populous38]

Brilliant, thanks Trev. Would you hazard a guess as to why its marked both 333 and 18K.
Gary

[dognose]

Hi Gary,

I suspect the '333' is nothing more than an internal factory code, but it would be good to hear the thoughts of others.

Is the pendant marked?

Trev.

[AG2012]

HI,
Very unusual to see two standards on Italian gold.
Have never seen 8 K gold in Italian jewelry.
Have it tested.
Regards

[populous38]

Thanks Guys.
I can't see a mark on the pendant but the pendant ring is to small to get the chain off.
Gary

[amena]

Thes hape of the mark 1 AR is the one in use before 1970. The most probable hypothesis is that it is gold 333/1000, a fineness admitted by Italian law at that time, and that the 18k refers only to the gilding.
However the 333 gold has a specific weight of about 10, while the 18 K has a specific gravity of over 15, it should be recognized also weighing it in the hands.
I asked a question at 1 AR.
If they replay to me I will post the answer here.
Best
Amena

[AG2012]

It seems what we have here is 18 K plated chain.
Besides,it tarnishes differently where gold plating disappeared.
Regards

[amena]

The 1 AR company answered my question confirming what I had anticipated

We confirm that the punching 333 corresponds to the 8 carat fineness
The 18k punching has no value since the legislation requires that the amount of metal used in the alloy must necessarily be expressed in thousandths

Best Amena

[AG2012]

Uneven discoloration (oxidation) of the chain is probably caused by 18K gold plating over 8K
I.e. 18K gold plating partially rubbed off and more oxidation of 333 base. Meaning 18K stamp was not struck to deceive but indicates gold plating.
Still, misleading.

[dognose]

Great work Amena! Many thanks for clarifying this anomaly.

Trev.

[populous38]

Thanks guys and especially Amena. I thought it was 8 ct but local Jeweller swore on his life that it was 18k.
Gary