Please Help With A New Abbreviation I've Never Seen.

I have just received an order for some stamps for 1991-1995.

The stamp in question is at the bottom:

US Scott No. 2606 1992 Presort ABN. I understand that ABN stands for the American Banknote Company.

US Scott No. 2607 1992 Presort BEP. I understand that BEP stands for the Bureau of Engraving & Printing.

US Scott No. 2608 1993 Presort SV.

What does the SV stand for?

I need to understand because although it isn't the kind of thing that makes it a different "type", I still have to make a place for it on a page and have the SV over the space to signify why it is different from another stamp.

Thanks to anyone who can help.


-IBFS

SV = Stamp Ventures in my 2014 Scott Specialized

That would be "Stamp Venturers" the private firm which later became Sennett Security Products.
There is a page at https://info.mysticstamp.com/learn/...mp-printers/ which lists all these modern producers which might be useful.

Thanks Guys!


-IBFS