1788 Massachusetts Colonial Large Cent / 12-M?

I'm not too familiar with the Massachusetts copper coins either, but there are a few 1788 varieties with the tail feathers above the bar. J and K for sure and there may be others. I'd say it's a 1788.

So @lcutler you are correct and the reverses that correspond to the shorter tail feathers are H-K, and M. It's clearly a 12 Obverse. I was getting frustrated because H-K did not overlay to my satisfaction and L was back to long feathers. However it appears that they then went back to shorter feathers for M. This appears to match up best to a 12-M R.4. So that's the best I could do with this. I'm posting the images of a 12-M that I used which match up the best of any combinations of about 20 coins at Heritage. Thanks for your input.

True, at this point pretty clear it is a 1788 so the title now reflects the current status of the thread.

Just as an aside though yes I agree it looks like an 8, but I've seen coins in this condition before where the number may have been damaged and ends up looking like something it isn't. So I wanted more confirmation based on the coin itself that it was in fact a 1788 and not assume that just cause it "looks" like an 8 that it actually is.

Thanks @Dearborn. Yeah it's obvious now it's an 8. I got thrown off by seeing only long feathers on other 88s on ebay and only short feathers on 87s. Found it at an estate liquidation sale.