[quote name='Musky' post='1180029' date='Mar 28 2011, 09:02 PM']It rather depends on which 4001 or 4003 as they've both changed a bit through the years, but the overriding differences are in the neck. The 4003 had a chunkier volute, a revised truss rod and (if memory serves) quarter sawn timbers.[/quote]
I get the impression that much like Leo's stuff there was a certain amount of random variation between standard models! The 4003 neck seems slimmer to me, maybe im crazy....