Case number 49

Hammered string (Piano string) Hammered string (Piano string) 2 Slide rules Slide rule
Special slide rule Slide rule Japanese calculating machine Russian abacus
Kings Patent calculator Calculating clock of Wichmann Brunsviga sprocket wheel Soroban from Tokyo,  Japan
Calculating machine Curta II Calculating machine Brunsviga 13 Adding device Arithma Calculating machine Curta I
Calculating machine Adix Stschoty from russia Calculating machine Mercedes Calculating machine Trick
Graphical firing table 2 Slide rules Calculating machine Archimedes
Aristo Slide rule model Studio Calculating machine Brunsviga 20 Folding rule
Suanpan (chinese abacus) Model of mechanical counters in number systems with the base 2, 4 and 10 Calculating machine Madas Model 12 E

The corresponding bottom case is: Case number U 49

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