Did it happen to have a small chrome plated headlight on the front fender? Colson, in their Imperial series, along with Hedstrom and Garton made '50s trikes that were primarily black with other colors mixed in as trim. The Garton was their police style tricycle from the 1952-54 time period. Oh, and there's also the Rollfast Hopalong Cassidy trike that was black and white with chrome features. The Colson Imperial trikes, like the one in my thumbnail photo, have lots of chrome details and also sported the headlight that I first asked about. I have a Hedstrom trike mainly black but just the normal amount of chrome - handlebars, seat springs, and hubcaps. That might give you a few models to check out on Google.
Dave