Hoses with GM logo and square on them--when did they first start?

[Mike E.]

I always thought that that hoses with the GM logo and a square started with mid-years. Then I ran across a bowtie 62 with original hoses, clamps, and fan belt, etc. That had one hose with that logo. (First picture) Then I took the gas tank cover off a 57 today. Don't think it was ever off before, but don't know that. Second picture is what I found. When did that logo first begin to show up?
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[Wayne M.]

Re: Hoses with GM logo and square on them--when did they first start?

Mike -- I assume you are talking only coolant hoses. These are A/C hoses off an early '64 MY A-6 compressor (supposedly from a Belair). No square, but dated.

Dec'63 R12 hoses Goodyear.JPG

[Mark S.]

Re: Hoses with GM logo and square on them--when did they first start?

Mike: The GM logo and a square was on the hose that connects the fuel tank to the fuel filler neck on my 56 Corvette; so we know it goes back to 1956. I sent an article to Vinnie with pictures of the original items under the fuel tank cover. Mark