I recently removed some 20 amp single pole breakers from an industrial/office building panel. They are listed as being manufactured by â€śTrumbull Electric Manufacturing Company, A General Electric Organizationâ€ť. It does not show a model number or type. It is 6 inches tall by 3.5 inches deep by 1 3/8 inches wide. The patents listed on the side all date back to about 1936. The only other label refers to it as â€śIssue J*964â€ť. I'd like to find a double pole 30 amp breaker to replace the two single poles. What can anyone tell me?