Gebr. van Wetteren, Haarlem

12

Gebr. van Wetteren, Haarlem (2)

3

Kenneth McCulloch, London

3

Wetteren, Gebr. van

3

Ruhmkorff, Parijs

2

W. Kenrick, Amsterdam

2

W.M. Logeman, Haarlem

2

Watkins & Hill, London

2

Aimant Jamin

1

Andersen & Sorensen

1

Benjamin Ayres, Amsterdam

1

E. Sauerwald, Berlin

1

Edward Nairne, Thomas Blunt,London

1

English manufacture

1

F.W. Funckler Haarlem

1

French manufacture

1

Gebr. van Wetteren

1

'IN SOLINGEN'

1

J.C. Voigtlaender, Wenen, 1732-97

1

J.M. Verbeek

1

Lab. Philips, Eindhoven

1

M. Logeman, Amsterdam

1

M. Meyerstein, Göttingen

1

P. & J. Dollond, London

1

Philips Lab. Eindhoven

1

Philips, Eindhoven

1

Possibly George Adams, London

1

probably Logeman

1

brass

23

Mahogany

15

Iron

13

Glass

12

Wood

7

oak

4

baize

2

Copper

2

ivory

2

Magnetite

2

Metal

2

agate

1

Ebonite

1

koper

1

Paper

1

Platinum?

1

Softwood

1

Stainless steel

1

Tinplate

1

zinc

1