S&W Box Label Codes

[Handgunner00]

Looking at a mint condition 64-1 in my LGS, but have a couple of question about the label codes on the box:
1. What would be the correct code for the standard front site serrated ramp (not pinned and without a red ramp insert)?
2. What do the codes INS and PKR mean?

Thanks.

[GeoJelly]

I'm pretty sure the INS stands for inspector and PKR stands for packer. I do not have the boxes for either of my 64's so I do not know the product codes ...

[Handgunner00]

Thanks for the info. The 64-1 I was looking at dates to 1974 and I don't think product codes were included in the box labels back then.