Omega geneve 166.0173 tritium lume

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Hey all, I'm looking to purchase a vintage Omega Geneve 166.0173 from 1973. It doesn't have the T symbol next to SWISS MADE at the bottom of the dial, so I was assuming that it doesn't have tritium lume. However, I read online that some vintage Omega watches have tritium lume even if it doesn't have the T symbol. Does someone know? Thanks!

 
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That one will have tritium. There’s a period in the early 70’s where the dashes replaced T’s on some modes such as this.