Resistance box no.1077 marked "Refilled by Gambrell Bros"
Resistance box no.1077 marked "Refilled by Gambrell Bros", and with affixed label dated 1909, 1 ohm to 5000 ohms
Resistance box no.1077 marked "Refilled by Gambrell Bros", and with affixed label dated 1909, 1 ohm to 5000 ohms