Interesting dial on 1950’s Seamaster

Hi everyone- I recently bought this Seamaster because it’s got a dial I’ve never encountered before. The printing looks original to me and the dial has a great patina, and the hands line up properly with the outer minute track. I’ve searched online and haven’t found any similar watches, and to add to the mystery it appears that the reference number has an overstamped digit… is it 2573, 2575, or ??
I also haven’t seen the -3 and C after the ref. online yet either. Regardless I like the watch, so I’m really just looking for any info that someone might have to offer up. Thanks 🙏🏼

I paid more than I would normally for a Seamaster like this, but I felt that the dial was too interesting to pass up…

You’re right… 2576-3c… now I see them 👍