I did consider starting a new post, but consider it relates to points already made, so remained here. Without getting too deep, I have followed the suggestion and looked again at some of my coloured 'Webb' (Thomas Webb) - re Skelcher etc.
Something I hadn't fully realized was the unfortunate image/colour difference between the examples of 'Sunshine Amber' shown in Barrie Skelcher's two books. You would be forgiven for thinking that the very odd looking pictures in the earlier volume were not in fact the same type of glass as shown in the later book, where pictures are very realistic. I don't recall this very unfortunate difference being mentioned in the recent review of the later book.
Oddly, Skelcher doesn't refer to the expression 'Gay Glass'. The attached pictures show a couple of standard 'Amber' Bull's Eye bowls (non Ur.) - plus a small bowl in yellowish green glass which flouresces, so I'm thinking this is from the 'Gay Glass' range, but it appears to be far too pale to be 'Amber Sunshine'. On the Glasseye web site, there is mention of a lighter colour called 'Spring Sunshine'(?) - might it be this?
Regrettaly, in the light of comments earlier in this thread, the titles of the books in question are doubtless mis-leading - although as they are U.S. productions it is understandable

, but I certainly wouldn't be without them.
I see also Sue that your book mis-spells Josef's name

References: The Big Book of Vaseline Glass - 2002...........and Vaseline Glassware - 2007
both by Barrie Skelcher and published by Schiffer.