Found this ad on Kijiji.
https://www.kijiji.ca/v-view-details.html?adId=1246133819 (https://www.kijiji.ca/v-view-details.html?adId=1246133819)
( dead link 04-06-22 )
Rare vintage BELL CANADA roof top 2 sided advertising light. $375.00 - Measures approx. 15" x 15" x 4 1/2" wide. In excellent working condition - As with all my finds I don't touch them in any way.
Interesting, but is is it an actual Bell Canada sign or something else?
Myself, I couldn't tell you. But I'm thinking something else. because I don't recall Bell Ad's being red.
Seems a lot of people named "Bell" or decided to use "Bell" to ring in the business have adopted or adapted the bell outline for their businesses.
Here are 2 similar icon uses (top) and two different (that are the same but for two totally different businesses) as examples of the "bell" use I found quickly - there are many other such uses including the Iroquois which Bell sold but without the use of the bell icon.
However, I think that red bell light is great even if not phone related. It's old and probably one of a kind but $375? A bit steep, in my opinion. I'd go $75, maybe.