The "historic collections" #1 and 2 do have dates. The side-facing "silhouette" style Goat herald started in 1936. I can't say for certain what size it was, but I could inquire for you over on the GNRHS io group if you want. I'm a GN steam-era modeller and I can't even keep track of the heralds. Usually I just work from photos. 


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Brian Stokes
https://northpoint48.blogspot.com/