Aristo 90125 Acetylene Slide Rule

Country of manufacture: Germany,            Date of manufacture: ____
Overall length: 31.1 cm,          Width: 4.1 cm,           Weight: 104.5 gms
Materials: all plastic, closed-body simplex
Cursor: 4.0 X 3.9 X 0.8 cms; all plastic slightly magnifying; lines = one
Scales: 13, all specialized
Front: 28 cm // A1, A2 [ D (0 - 50°C), E (710-730 mm Hg), (inverted) D (0-50°C), (inverted) E (730-750 mm Hg) ] B %CaC2, C C2H2 Dry
Back: blank
Slide Back: D (0 - 50°C), E (750-770 mm Hg), (inverted) D (0-50°C), (inverted) E (680-710 mm Hg)
Gauge Marks: [      ]
Condition: C2 (Mint but w/o all extras-no manual)
Came with: Gray/White plastic case