Dynaco
Dynaco tube equipment

Model
Type
Channels (Power)
Year Introduced
Dynaco Mark II
Power Amp
Mono (50 watts)
1955
Dynaco PAM-1
Preamp
Mono
1957
Dynaco Mark III
Power Amp
Mono (60 watts)
1957
Dynaco Stereo 70
Power Amp
Stereo (35 wpc)
1959
Dynaco PAS-2
Preamp
Stereo
1960
Dynaco Mark IV
Power Amp
Mono (40 watts)
1960
Dynaco FM-1
FM tuner
Mono
1961
Dynaco Stereo 35
Power Amp
Stereo (17.5 wpc)
1963
Dynaco SCA-35
Integrated Amp
Stereo (17.5 wpc)
1964
Dynaco FM-3
FM tuner
Stereo
1964
Dynaco PAS-3X
Preamp
Stereo
1966
Dynaco Mark VI
Power Amp
Mono (120 watts)
1976

Question: Which amplifiers did Dynaco release between 1963 and 1964?
Answer: A tube amplifier, the 17.5wpc Stereo 35, was introduced in 1963, and was followed the next year by the stereo SCA 35.