One is the "Seagull's Special" roundel used on soccer special trains, t'other is a rather stylish stained glass rendition of the logo, origin unknown. Hopefully the photo attachment issue will be sorted one day?
I snapped these in the Club Museum on Friday after a tour of the Amex. I think they would look nice, but in view of Bozza's comment re: the apparent upturn in form since the old masthead was restored perhaps it would be wise to apply the "..if it ain't broke don't fix it" principal.