Looks like a pedal fire jeep card.
“Vintage die-cut paper Greeting Card – Happy Birthday – please see above all scan picture & condition ..
– Measure Size: 4-1/4″ length x 5-1/2″ height close fold 1/4 and full open is 8-1/2″ length ..
– Used – signed/writing on inside card ..
– Year: 1950 write”