Identifying a specific brand of coat from the 1960s based on a description of it being single-breasted with a velvet collar is quite challenging, especially given the wide range of fashion brands and styles prevalent during that era. Coats with velvet collars were a popular style in the 1960s and were produced by various fashion houses and designers.

If you have more details about the coat, such as a distinctive logo, pattern, or other unique features, that might help narrow down the search. Additionally, knowing the country of origin or any labels that might have been on the coat could also be useful. Without more specific information, it’s difficult to pinpoint a particular brand.