The description on the front of the card:
Zanesville, Ohio. Black Hand Interurban Tunnel.
Postmark Date: December 30, 1907
Era: Divided Back Era
Publisher: Hugh C. Leighton Co., manufacturers, Portland, ME
Printed In: Frankfort, Germany
The Hugh C. Leighton Co. of Portland, Maine, was a printer and a major publisher of national view-cards, mostly of New England, from 1906 to 1909 when they merged with Valentine & Sons. Most of their cards were printed in Frankfort, Germany, but some were printed in the United States.
Rights Info: Public Domain
Source: Metro Postcard