https://pennantfever.weebly.com/
I had never given much thought as to who was making pennants, back in the day. About the only vintage company I knew of was AdFlag and only because it's printed right on their pennants. I knew of Trench, but only as a modern producer. Here's a couple of modern (1970s) pennants with what appear to be manufacturer's marks (M in a circle and VET). I have no idea who or what they mean. Kyle?
Finally, another "cartoon font' (presumably Trench) pennant which can, obviously, be dated to 1962.