RESISTANCE COILS 1652
In bakelite case with two terminals with values written in white. Bobbin non-inductively wound with double silk covered constantan wire. Accuracy ± 0.2%. Standard values in Ohms:
(a) 1, (b) 2, (c) 5, (d) 10, (e) 20, (f) 50, (g) 100

POST OFFICE BOX, PLUG TYPE 1660
The heavy brass contact blocks fitted to the bakelite plate. The inter-changeable plugs are cut to a fine taper. Each resister independently mounted with double leads wound with non-magnetic and non-inductive wire dipped in boiling wax. Provided with 3 ratio coils of 1000, 100 and 10 ohms, Rheostat arm 1-5000 ohms and two tapping keys for galvanometer and battery in polished wooden case with hinged lid of size 280 x 200 x 175mm. Accuracy: 0.05%

POST OFFICE BOX, PLUG TYPE 1661
Same as above but with 4 ratio coils. Accuracy: 0.05%

RESISTANCE BOXES, PLUG TYPE 1664
The heavy brass contact blocks are fitted to the vulcanite plate with double nut system. The plugs and lugs are cut to a fine taper and are inter-changeable Each resister independently wound with double leads. Accuracy of the Constantan coils is 0.1% for lower values 0.05% for higher values. Fitted in polished wooden box. Demonstration type with transparent sides is also available on demand.

	Range in Ohms	No. Coils	Total Resistance
(a)	0.1 to 1	9	2 or 1
(b)	0.1 to 1 or 1 to 10	5	2 or 20
(c)	0.1 to 5 or 1 to 50	8	11 or 110
(d)	0.1 to 10 or 1 to 100	9	21 or 210
(e)	0.1 to 50 or 1 to 500	12	111 or 1110
(f)	0.1 to 100 or 1 to 1000	13	211 or 1110
(g)	0.1 to 500 or 1 to 5000	16	1111 or 11110
(h)	0.1 to 1000 or 1 to 10000	17	2111 or 21110

RESISTANCE BOX DECADE TYPE SINGLE DIAL 1668
A dia sweeping brush contact, one for the main central contact and other for individual resisters, made from hardened copper phosphor bronze strips enforced by a spring strip are held in place by a rotating bakelite knob. The values of resisters are engraved on the vulcanite plate indicated by the index on the edge of knob at each click stop. Constantan wire, double wound resisters are dipped in boiling wax for constant values. Accuracy 0.1 % Ten steps of 0.1 ohm total 1 ohm, or Ten steps of 1 ohm total 10 ohms.

CONDENSERS (CAPACITORS) 1670
Mounted in teakwood box with plastic top with two terminals. Accuracy 1% w/o power factor.
(a) 0.001-0.01 mfds, (b) 0.02 mfds, (c) 1 mfds, (d) 2 mfds, (e) 5 mfds

DECADE CAPACITANCE BOXES (250V DC) 1680
Single dial
(a) 0.001 mF to .01 mF in10 steps
(b) 0.01 mF to 0.1 mF in 10 steps
(c) 0.1 mF to 1 mF in 10 steps
(d) 0.01mF to 10 mF in 10 steps

DECADE CAPACITANCE BOXES (250V DC) 1681
Two dials
(a) 0.001 mF to 0.11 mF in two decades
(b) 0.01 mF to 1.1mF in two decades
(c) 0.1 mF to 11mF in two decades