Calling all experts 1970s Question

I found 3 1970s specimens and I think there are 2 LD and 1 SM. Correct or incorrect?

 

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All look like Large dates to me albeit in various states of damage/wear.

 

They all look like large dates to me. The one with the gunk on the left maybe a small date, but the wear on it is pretty good. The 1, 7, and 0 Line up pretty well

 

It appears to me they are all large dates even the one with whatever that is on it. LOL
Dave

 

All large dates.

 

Large in charge.

 

The one that’s darker, I think shows a 9 with a more open loop, I thought that one was a SD

 

Have not had a chance to clean it

 

All look like LD’s to me. The way the 9 points is the best way to tell imho.

 

Wheels here something that helped me out. (Not my image) LOL

Dave

 

Then I believe this one looks like a small date ??

 

I'm gonna have to say no on that one too.

 

Lol ok

 

Notice the shape of the zero inner lines, if the 9 is indecisive.