The pages of Electrical Engineering, formerly the Southern
Electrician,
supply this month's ads.
July, 1913 illustrates suspension disks.
September, 1913 shows the Thomas #3008 which is M-3105.
October, 1911 show Thomas #1101 which is a U-267A.
Thomas insulator #2012 is depicted in this old ad. It is a U-927
glazeweld known to Thomas and rare for Imperial Porcelain.
This ad shows Thomas #1097. This is a U-593 and is
unknown. Maybe someone out there has it
sitting on their shelf and doesn't realize it.