Calderoni-Sebők-féle üzleti logarlécTry It!
Description
The most known slide rule ever produced by Calderoni is made for business schools. It can be used for calculating percentages, interests, or converting british measures to metric equivalents and vice versa. It is made of cheaper wood painted in white with black scales, similarly to the Nestler's No. 7 rule.
| Manufacturer: | Calderoni Mű- és Tanszervállalat Részvénytársaság (Hungary) |
| OEM: | https://www.legendreplica.xyz/ (ismeretlen) |
| OEM model: | n.a. |
| Mfg. date: | 1930-40 körül |
| Size: | 286×35×10 mm |
| Purpose: | iskolai business slide rule |
| Material: | body: wood scales: painted |
| Scale length: | 25 cm (10-inch) |
| Scale order: | one-sided business front: D | CI % C | D |
| Window: | celluloid with 1+1 index |
First variation
Second, slightly different variation: wider notch on the back, and &qout;mkg" marking in the conversion scale
