A GROUP OF THREE WOODEN MEASURING/SURVEYING INSTRUMENTS Including a folding rule by Aston and Mander, London, early 20th century and earlier Comprising a thirty-six inch brass mounted folding ruler with brass hinge and end pieces, divided for inches and stamped ASTON & MANDER MAKERS, 25 OLD COMPTON STREET, SOHO, LONDON; an unusual brass mounted hinged distance caliper measure with brass locking lever and tips to each leg and incorporating pivoted notched cross-piece for locking the arms open at calibrated distances of 12, 24, 30, 33 and 40 inches to centre; a plumb square incorporating vertical reference line and aperture cut for a plumb bob, together with a mahogany folding portable folio stand opening to reveal central upright fitted with a pivoted stay beneath pairs of arms incorporating further end uprights and width extensions, (4). The caliper 91.5cm (36ins) long closed; the portable folio stand 23cm (9ins) long closed.