BRL P4366 EMEFCO Ultrasonic Slide Rule, M. Falk & Company Ltd

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Country of manufacture: England,            Date of manufacture: >= 1967
Overall length: 24.6 cm,          Width: 5.0 cm,           Weight: 81.8 gm
Materials: All plastic body; plastic end braces
Cursor: no cursor on this specimen
Scales: 16, specialized
Front: E - Wavelength λmm, A - Beam Spread, D - Velocity [ C - frequency, B - Crystal dia. mm, F - α/β Shear, G - α/β Comp. ] H - Material, I - decibels
Back: inch/cm scale, L - Wavelength λmm [ K - Near Zone (N) mm, J - Crystal Dia. mm, N - t, R, and S mm/cm/inch ] M - Probe Angle, O - Probe Angle
Gauge Marks: [       ]
Condition: C3-C4 (Very minimal to minimal signs of use) but missing cursor
Came with: Original brown leather slipcase

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