Time Tunnel

From Author Wars - https://authorwars.com/publications/time-tunnel-203433.html

Overview:

Title: Time Tunnel
Author: Murray Leinster
Year: 1964
Publisher: Pyramid Books
Price: $0.50
Pages: 140
Binding: Paperback
Type: Novel
Title Reference: Time Tunnel
Notes:
"A Pyramid Book - First printing July, 1964" on copyright page. Apparently the second printing reused the ID. Same cover was retained for at least four printings. Cover artist stated on the back cover in small print.