Guide price: £20-50

An interesting collection of MATHEMATICAL INSTRUMENTS to include slide rules - a Series 1 by Classic, an example of 'The Technical Standard Slide Rule', a 367 AW Faber (DR patent No 206428) and one other plus a Zero pocket balanced measuring up to 30lbs by Hill of Birmingham, a Victorian paper-winder to make scrolling plans etc easier and an old-fashioned wooden paper guillotine from Merretts etc