1929 Parker vh 16

[Falls county]

Howdy. New Parker owner here. Long time admirer though. My 16 gauge has PNN3 on the under side of the barrels. What is this? Also “HT” is stamped w an “A” below. Again, uncertain what this represents. Serial number is 232451. There’s a “3” w smaller “.5” beside it. I’m assuming that is the total weight of the barrel(S). Other stamping include “V” w circle. On the barrel lug is a “16” w a “1” stamped below.

I’ll try to include pics. I’ve sent in for the letter. I’ll try to post pics. Again, I’m new and trying to figure this out.

Thanks for an awesome website and your time.