How's this for a STAR insulator?

By John Graham; posted January 24, 2004

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This is a PYREX insulator - CD 542 - used in Italy. Anybody know what the DI.W.S. embossing stands for? It is embossed on the other side:

[IFONA CD 542]

PYREX 1957 / MOD 2 1920 TS

79573384