Sony TC-135SD Cassette Deck - Serviced & Working

In good condition. Tested and working. The unit has been fully serviced. Plays and records. 
 
Please note that the pause button does not work; otherwise, the machine works fine and sounds lovely. 
 
Has a few age-related marks from use (see photos).
 
Specifications:
Type: 2-head, single compact cassette deck
Track System: 4-track, 2-channel stereo
Tape Speed: 4.75 cm/s
Heads: 1 x record/playback, 1 x erase
Motor: DC servomotor
Tape Type: type I, CrO2, FeCr
Noise Reduction: B
Frequency Response: 30Hz to 15kHz  (Cr02 tape)
Signal to Noise Ratio: 58dB  (dolby B)
Wow and Flutter: 0.2%
Total Harmonic Distortion: 1.7%
Input: 60mV (line), 0.2mV (mic)
Output: 0.435V (line)
Semiconductors: 18 x transistors, 11 x diodes, 2 x IC
Dimensions: 423 x 117 x 268mm
Weight: 3.75kg
Year: 1975