Gamma 2512Try It!
Prices of the rules are the same for almost 30 years: Ft 169 for the first-class pieces, and Ft 118.30 for second-class ones. A cardbox case and a short description were included in the price.
Due to decrease manufacturing costs the rules produced later had been simplified: all scales and marking are painted in black. The window are made with 2-sided springs for more precise reading. These rules has the Gamma logo in the stock, but without 2503 model number. All rules has classification markings.
After the production line was sold out, the Logar brand is appeared in the rules. The rules manufactured at Monor has some minor differences due to newly published national standard MSZ 4617-57 in 1957: The C and D scales has two new constants for converting small angles to radians, the lg, sin and tg labels are retyped with standardized letters, and the placing of decimal point or comma (depending of scale!) is modified. These rules has an additional label stamped in the stock that declares the classification of MSZ 4617-57 standard.
Manufacturer: | Gamma Finommechanikai és Optikai Múvek N. V. (Hungary) |
Mfg. date: | 1949-51 |
Size: | 294×41×14 mm |
Purpose: | standard slide rule |
Material: | body: pearwood scales: celluloid |
Scale length: | 25 cm (10-inch) |
Scale order: | Darmstadt front: cm L / K Ah | Bh CIh Ch | Dh P / Sd Td back: | LL1 LL2 LL3 | |
Window: | plastic with 3+1+1 indices |