Vintage Tyndale 3 sided Elephant Lamps

Hi!...This is part of today's haul...they are a pair of vintage Tyndale of Chicago Bronze/Brass 3 sided Elephant lamps....they are approx. 14 in Ht.....I would have liked to have gotten them for $40 ea...but I paid a little more than that....they do have shades...but the shads are a little bit worse for the ware...which is not unusual....but I'm pleased...I have been eyeing these lamps for a while....although on several sites I've seen these lamps listed as bronze...I'm not entirely sure that they are....bronze is usually somewhat heavy...so these could be brass...

 

https://www.ebay.com/itm/194485252268?hash=item2d483970ac:g:cWgAAOSwUl5hgV~I#viTabs_0

Here is an Ebay post of the same lamp. What do you need help with? Date of make, est price or verifying if it is bronze?