Announcing a new Book for Slide Rule Collectors:
“THE ALRO CATALOGUE” …
… featuring for the first time all 52 currently known solid calculating discs and slide rules, plus the over a hundred slide charts, that were produced by the Dutch firm “ALRO” in the city of The Hague, from the mid-1930’s until the late 1990’s.
We proudly announce “THE ALRO CATALOGUE” (2020), in a hardback bound book format, with more than 200 pages of descriptions, tabular data, documentary annexes, a new coding system for identification, and — most importantly — the high-resolution colour images of each and every ALRO that is known today.
“THE ALRO CATALOGUE” has been prepared and produced by Otto E. van Poelje, under the aegis of the Dutch Circle for Historical Calculating Instruments, with support by the IM2019 organizing team.
“THE ALRO CATALOGUE” is for sale at € 35.- (in euro’s).
Orders for the ALRO BOOK can be placed via PayPal by one of the two next buttons
Alternatively, orders can be placed by bank account transfer: