RQT-1†
Example serials†
- 1318 dated Mar 1974
- 1413 dated Jun 1974
RQT-2†
RQT-3†
Example serials†
RQT-4†
Example serials†
RQT-5†
Quartz Timer RQT-5 testing & timing machine, circa 1975
Example serials†
RQT-6†
Example serials†
RQT-S†
- 8155 dated Sep 1976
- 8160 dated Sep 1976
Ricoh Tester
MIC-R32†
Serial 1101 dated Oct 1978
Other brands†
Seiko†
QT-77†
Made by Fuji Denshi
QT-99†
Made by Fuji Denshi
QT-2100†
QT-2300†
To 2016
QT-2400†
2016 onwards
Citizen†
CQT-101†
CQT-210†
Heiwado Trading†
HT-402†
With plugin sensor stand
HT-403†
Fuji Denshi†
QT-10†
QT-100†
ADP-1 QT-100 adapter†
QT-200†
Dated 50-4
QT-200II†
Dated 76.9
US-32†
Ultrasonic microphone, dated 76.11
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