Hello, I purchased this spool and can't find any info on the internet related to this marking. It is marked in an arc MANITOBA BRIDGE and on the bottom a catalog number I can't make out. The base is marked with Hamilton Porcelain Ltd HP marking and Made in Canada. Any ideas on the marking, company history etc is very much appreciated. Another marking I'm having trouble finding info on is HAYES. I don't know if they were an electrical co. in Canada or a jobber. Thank you to all. Jim