| SC-E39C1 | IEC60061-3,7006-24B-1 | E39 “Go”gauges for E39 caps on finished lamps |
| SC-E39C2 | IEC60061-3,7006-24C-1 | E39 “Not Go”gauges for E39 caps on finished lamps |
| SC-E39C3 | IEC60061-3,7006-24A-1 | E39 Gauge for finished lamps fitted with E39 caps for testing contact making |