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Anthony,Would it be Conca d'Or? Looks more open than I recall of 'Golden Splendour' when I used to grow it many years ago, but I realise that is a grex anyway. Conca d'Or almost looks like a yellow oriental to my eyes, but is an OT as far as I know. I'm happy to be corrected if I'm wrong. Only way to learn.
The leaves are definitely those of an OT not a trumpet. I see Jacques Amand lists both Conca D'Or and Boogie Woogie; it looks more like Conca D'Or to me.