It could indicate KaraT Plated, meaning that the necklace is gold plated.
The KTP-445 is small at 7" x 2-1/2" x 3/8
The KTP were the winners of Veikkausliiga in 1951.
The KTP were the winners of Veikkausliiga in 1952.
The winners of the Finnish Veikkausliiga in 1952 were KTP.
The winner of the Veikkausliiga league in 1952 was KTP.
The KTP team won the Veikkausliiga in the year 1951.
The KTP team won the Veikkausliiga in the year 1952.
The KTP team was the winner of the Veikkausliiga league in 1951.
KTP was the winner of the Finish Suomen Cup in 1958.
The winner of the Finish Suomen Cup in 1961 was KTP.
KTP was the winner of the Finish Suomen Cup in 1967.