glasgow hallmarks

My father recently passed away and left me a sugar bowl and tea pot that was given to him by my grandfather, Both bowls have our family crest and motto engraved on them. No one has been able to tell me of their origins, cany any one help?
Thanks, Ben McCormick
sugarbowl.jpg

Strictly speaking this is not a hallmark as the “EP” indicates that the material is electroplate and not solid silver. Unfortunately I cannot identify K&Co but the G normally stands for Glasgow when used on electroplate.

Hey i think the top mark may posibly be masonic