McInnes-Dobbie steam engine indicator
1888 (design date)
McInnes-Dobbie steam engine indicator, a chromium steel valve, a varnished mahogany rod component, a balsa triangular component, and an information card for ‘The McInnes-Dobbie steam and gas engine indicators’, by McInnes-Dobbie Limited, London, England
1888 (design date)
1888 (design date)
1888 (design date)
1888 (design date)
1888 (design date)