N/A. Deutsch: Calcorota, Tretkurbelrad von Johann Friedrich Trefz, 1869 . Patentschrift von 1869. Unknown 263 Calcorota

---

Size: 3040px × 1644px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., /, /., 1869., patentschrift, unknown., von