Forward Spark 'B' Wavemeter No. 1511, by War Department, Britain, c. 1918
Inventory Number: 12772
Date: c. 1918
Maker Details: Signed by War Department Signals Flying Corps.
Inscription: "W.D.S.F.C. 2214" inscribed on top panel of wavemeter. "FORWARD SETS B WAVEMETER" inscribed on wavelength dial. "FORWARD SPARK 'B' / WAVEMETER / NO 1511" pasted on interior of lid.
Size: 140 x 130 x 130 mm (lid closed)
Other Given Number(s): Christie's 131, 844/2 (white tag).
Forward Spark 'B' Wavemeter, in compact teak case with lid. Includes carborundum detector, buzzer, rotary receive/send switch, condensor and instructions including wavelength calibrations on inside of lid. Buzzer dated 1918? Previously catalogued and associated with Empty Case Of Forward Spark 'B' Wavemeter No. 2001 (Inv. Num. 71985).