Could be even late '60s, but I'm guessing the design itself dates from no earlier than '58 and no later than '64. The control console is treated as a separate design element from the range top, notice the way the console base is not full width. This sort of thing was most common around '60, remember the many appliances with "floating" consoles. Once a manufacturer got a design into production it could hang around for awhile, making it harder to date. It's a nice looking range, just clearly not made in 1950.