Here’s my 753 ‘85 Pro. A very nice riding bike. You’ll see this color scheme in the catalog/brochure as well (I have a copy) with a 753 sticker. To my knowledge the only other Merckx production frame in Reynolds (653) is the ‘89 Century. I also have one of those. Didn’t set out to collect Merckx Reynolds frames, just kind of worked out that way.
Oh yes, the Gran Prix model as noted by jiangshi- I don’t have one of those!
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '95 Gios Compact Pro, '95 Carrera Zeus, ‘81 Masi Gran Criterium, ‘81 Merckx Pro, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, Rivendell Rambouillet, Heron Randonneur, ‘92 Ciöcc Columbus EL