Description
Gachot (Prof. Dr.H), The optical telegraph line Paris - Strasbourg 1798 - 1851, 34 pp., illustrations, published as DASV supplement Postal History and Old Letters, Issue 54, 1979 #42785
Gachot (Prof. Dr.H), The optical telegraph line Paris - Strasbourg 1798 - 1851, 34 pp., illustrations, published as DASV supplement Postal History and Old Letters, Issue 54, 1979 #42785