Set of brass drawing and measuring instruments in a green leather covered case

NOTES: This appears to be a composite set of instruments with the earliest piece (a folding rule dated 1598) inscribed with its maker's name, Marcus Purman (also known as Marcus Peurmann) of Munich. Other items in the set include parallel rules, pencil compasses, dividers, a protractor, a sector inscribed 'Daniel Chorez', an angle set square, a magnetic compass and a German scale with comparative indices for Munich, Vienna and Salzburg.