Tracing boards for sale

These rather smashing tracing boards (click to view closer) are going under the hammer at Christie's Out of the Ordinary sale on September 5.

They are described thus:

A GROUP OF THREE PAINTED CANVAS MASONIC PANELS 
EARLY 20TH CENTURY 
The three panels painted with Masonic imagery and one with Hebrew inscription, with oak frames
34 x 20¾ in. (87 x 52.5 cm.) (3)

They are being sold with an estimate of £1.000 - £1,500.