Looks like a 90 on the drive link. Which would use an 11/64" (4.5mm) chain.
I also emailed Oregon and he said the same. He also said if I had a hard time finding that size I could use a 5/32” which I already have! Thanks for your response!
Thank you.Here's what I have written down for this saw:
12” Bar - 124MLEA041
Oregon 90PX045G safety chain aka R45 chain.
Sharpens with 11/64” file. 4.5mm.
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