Is there such a thing as a Colt 57 cal. 30-06 single shot bolt-action rifle?
 

Recently, a friend told me he came across a Colt 57 cal. 30-06 single shot bolt-action rifle. Sight unseen. But I've never heard of Colt building a 30-06 model 57. (If they have, then I've spent way too many years hidden from sight...lol) Could you please send some info on this rifle if at all possible? In good condition would it be a good investment?
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