This old Noma C7 Christmas tree light cord still works. It dates to the 1930s (pre World War II). Though the red and yellow bulbs all light up fine, I'm including an extra six working GE and Mazda older bulbs as replacements in case they burn out (3 green, 2 red, and one yellow). The seven-light string is over 13 feet long and has the red wooden bead "berries" that help hold the lights in position on your tree. The cord has no splits or tears.

I'm including the non-original Noma box they came to me in. The illustration shows tubular candle shape bulbs. It's torn and warped, but all pieces are present. You can restore it by spraying the pieces with water, then placing them on towels weighted with books. Once fully dry you can tape the box back in place.