CIRCULATION OF THE BLOOD, VINTAGE TEACHING AID POSTER {HUMAN BIOLOGY} BLACKBOARD + CLOTH BACKED, BY H.E.P.
This type of wall chart was coated with a similar surface to blackboard paint which meant that the teacher could add their notes and then remove it with a blackboard rubber, (before throwing it at an unsuspecting pupil)!
Overall dimensions:40 x 30 inches
Condition: excellent, appears unused with a few bits of minor damage commensurate with age