This is an original 1933 halftone print of a poster advertising the London Zoo by Underground at either the Regent's Park or Camden Town Tube Stations. (Please note that, typical of halftone prints, there is printing on the reverse.)
This 78+ year old Item is rated Near Mint / Very Fine. No aging. No creases. No natural defects. No surface rub. No tears. No water damage.
This piece was illustrated by Brown, Gregory. Artist signature in print - top right of image.