I would think it dates from around the mid sixties.
^^^ I agree with this, it doesn't look like a 70s bike to me. Whatever the age, it's a very nice find indeed.
Oh yes,
if you were to decide to sell it as a complete bike, be aware that the 'vultures' would probably strip it down and sell off the components individually. The frame, hubs and chainset would all fetch decent prices. It is a shame (imo), when old bikes are ruthlessly stripped down, just so someone can make a few quid on
Ebay.
Ironically, this is particularly common within the V-CC; the club exists to promote the conservation
and preservation
of old bikes. It seems odd that so many (high-profile) members seek to buy old bikes (such as this Holdsworth), so that they can make a bob or two out of it. For many, the need to 'conserve' & 'preserve', is greatly outweighed by profit; consequently, the number of original bikes such as this, are gradually diminishing.
If this were my bike, I'd simply give it a thorough clean and use it . . . . . . . an excellent find !
Very sadly, our local refuse centre does not allow the retrieval of old bikes & frames