1935 Wakefield Patent Castrol Motor Oil - British Ad #N1190

This original 8.5 x 11" magazine ad appeared in the Jun 1935 British Magazine the Punch to feature the Wakefield Patent Castrol Motor Oil and a testimonial from what I assume was a popular period racing champion.  It's interesting because it list the oil containing CR(C17H33Coo)3 to reduce cylinder wear.