Walker, H.& Co.
3 cameras · 3 models · 1881–1882
| Model | Year | Typ | Lens |
|---|---|---|---|
| Amer.Challenge 3 1/4x4 1/4 | 1882 | Rk/Ms | – |
| Amer.Challenge 4x5 | 1882 | Rk/Ms | – |
| 1881 | Bo/Br | Achromat |
3 cameras · 3 models · 1881–1882
| Model | Year | Typ | Lens |
|---|---|---|---|
| Amer.Challenge 3 1/4x4 1/4 | 1882 | Rk/Ms | – |
| Amer.Challenge 4x5 | 1882 | Rk/Ms | – |
| 1881 | Bo/Br | Achromat |