J. Kampman, Adam Steitz Amsterdam

5

Jochem Cats, Amsterdam

4

Adam Steitz, Amsterdam

2

Cats, Jochem

2

Haas, J.B.

2

J. Kampman, Amsterdam

2

Siemens & Halske

2

Watt, A.

2

Alexander Wright & Co.

1

Cuthbertson, John

1

Ducretet, Paris 1880?

1

Eduard Wenckebach, Amsterdam

1

George Adams, London

1

J. Salleron, Paris

1

J.Kampman, Adam Steitz, A'dam

1

J.Kampman, Amsterdam

1

Klinkenberg, Leiden

1

Koenig, Rudolph, Parijs

1

Replica made by De Boer

1

W.M. Logeman, Haarlem

1

William Sugg & Co, London

1

Boxwood

57

Mahogany

25

brass

22

Glass

8

lead

4

nickel

3

tin

3

ebony

2

Iron

2

ivory

2

marble

2

Metal

2

oak

2

Wood

2

Copper

1

cord

1

Ebonite

1

Fruitwood

1

steel

1

walnut

1

elektrometer

2

leidse fles

1

model korenmolen

1

model molen

1

thermometer

1

windmolen

1