"Jan. 10th. 11" on the mount. Highly desirable. Photo" /> Proof 1911 "Key Type" £1 essay, the frame printed in black and with the name and value tablets handpainted in red, inset into sunken card (78x84mm.), annotated "B" and dated<I> "Jan. 10th. 11"</I> on the mount. Highly desirable. Photo | Christie's