Who Made Porcelain Vase in DAV ART NY Lamp

Hello,

I have a lovely pair of boudoir lamps marked DAVART NY and #3 on the base. I’ve read that the lamps with porcelain vases were made by Lenox. Curious, I looked at the bases of these vases and found matching handwritten number codes and partial backstamps that don’t reveal the maker. On one, you can see part of a large cursive letter L on top and on the other, there appears to be a banner below with the word PORCELAIN in it. Any help would be so appreciated! Thank you!