Four Antique Bunsen Burners Science Lab Equipment Scientific Instruments Metal

Description

Vintage Lot Four Bunsen Burners Science Lab Equipment Scientific Instruments
VERY open to reasonable offers
Today I am selling four vintage Bunsen burners. My father collects unique items and likes to put them into mini "collections". This auction is for : a Bunsen burner with a nice hexagon base. It is approx. 5 3/4" tall and the base is a little over 3" across. I don't see a makers mark anywhere. The second burner has a three legged base. It is approx. 5 3/4" tall and the base is almost 3 1/2" across. I don't see a makers mark anywhere.  The third burner is "mini" - I've never seen one like this before. It is a little over 2 3/4" tall and the base is under 2" across. It says Anderson & Forrester Denver on the base. The fourth, and final, burner is marked but I can't quite make most of it out, I can see  Pittsburgh PA, Scientific Materi*** Co, and some other words on it too. It is approx. 6 3/4" tall and the base is approx. 3 1/4" across.
I DO NOT KNOW IF THESE ARE COMPLETE OR WORK! BUYING AS IS. These are old / antique.  Please look at the pictures for the items condition. Pictures are part of the description.