Porsche Script ID

[GotaT]

I have 3 sets of porsche script that fits to my early engine lid and I observed a few differences in the font and the back sides of the letters appear different. Id like to know if someone can tell me what I have, .. ie different production years of script, or something unique, etc.

You'll notice some backs are smooth and some have "ditches"
Additionally the 2 smooth backed E's have what looks like 711 embossed

Thanks