1930 #152 4c Scroll single franking tied by TOronto roller (1929 Sep 30) on envelope with clasp to London, GB.
The rate is double Empire rate (c / oz) for two ounces for 4c, or given the clasp, was most likely quadruple printed matter rate, 1c / 2 oz for up to 8 oz.
A single 4c Scroll is rare indeed.