I was reading an article about Chic Calderwood in the November 25th, 1966 issue of the Boxing News and in the article, it places Calderwood's date of death as "early on Sunday morning November 13th". A short article first announcing his death in the November 18th issue noted his car crash taking place "in teh early hours of Sunday morning."
I see his current record states his date of death on November 12th.
Rocco Del Sesto