Could be an uncommon variation of #14, but the color is similar to the #52 Five Gaiter, with grey hooves and bald face. That color of the Five Gaiter was around from 1963-1986, however it does not appear these models have the USA Stamp, so that would date them to the 1960's. Some models have eye whites (most eye whites had ended by 1969).
Overlap production years between #14 FAM and #52 Five Gaiter is 1963-1973. Estimated these were made sometime from 1963-1969.