Coat of arms of the Republic of Upper Volta in the 1970's (and probably during most or all of the period 1960-1983), according to information in the book Guide to the Flags of the World by Mauro Talocci, Revised and updated by Whitney Smith (1982, ISBN 0-688-01141-1).
This somewhat resembles the current Burkina Faso emblem, except that the enclosing shield has a blue background, the horses are white, the inescutcheon is based on the flag of Upper Volta with the superimposed letters "RHV" (for République de Haute-Volta), and the motto was Unité, Travail, Justice ("Unity, Labour, Justice").
This vector image includes elements that have been taken or adapted from this file:
AnonMoos (SVG file), based on files by User:F_l_a_n_k_e_r and User:Erlenmeyer