I could not see enough but here is my take, the tube was made in Mexico, there is a centering switch for raster centering.
My guess is quote old???
Please check for any markings for UL approvals such as E### on the monitor labels not the tube. If you find those go to UL.com check their online registration for these numbers and you may find the manufacturer.
You probably know the tube size, but if not check the tube label it wil have a number such as A58... 58 means 58 cm, convert it to inches and you have the size.
Hope this helps, if not I am glad to try more...
Rck@niemandisplays.com