166.0173 Crystal

Hi all. Recently acquired this 1970s Omega Geneve 166.0173 as my first automatic watch. Although in excellent mechanical order the crystal has visibly seen better days. My watchmaker could only polish it from the outside as he could not guarantee a replacement in case it broke. I would like to have this replaced regardless as the watch is being used on the daily. Can you confirm the correct crystal for this model and recommend a reputable supplier? From what I could gather it should be a PX5200 with a yellow tension ring although I stand to be corrected. Thanks in advance.

you can use the reference number online (or ask chatgpt) to find the crystal. Then your best bet is eBay. You can check suppliers such as cousins in the UK, but parts aren't always easy to find.

Thank you very much. I'll have a look around.