This card was sent by the Packers in the early 1950s. It recently came up for auction at Heritage.
Early 1950s Gene Ronzani Signed Green Bay Packers Christmas Card - Only Example Known! Offered here is an original Packers team photograph Christmas card from the early 1950s signed by head coach Gene Ronzani. Signed in 6/10 green ink, it measures at 4.25x5.5". VG quality exhibited throughout.That's a new photo for me, showing the Packers in their early 1950s green-over-green combination.
Season's Greetings to you and yours!