This butcher shop has a steelyard scale.
This shop has a double pan balance.
The baked loaves are checked for weight at top.
A steelyard scale weighing cotton near Hico, Texas. Photo is not dated, but I guess it is from the first half of the 20th dentury. I saw a similar scale in the James Stewart movie "The Stratton Story".
I found the following picture on the Library of Congress web site. Note the picture was copyrighted by Underwood and Underwood in 1897. The pic shows Steelyard scales and balance scales found at Pompeii. They were in the National Museum, Naples, Italy, room of small bronzes. I could not find a similar pic on their web site.
I have shown this scale before, but I have been researching how it worked. I suspect the parts were not used together.