This is a fully featured 4.2 model and a good example of this late model Nagra from Kudelski. The features are as follows: s/n 0417097 7 in reel cover option 60 Hz internal crystal Sync Generator, Crystal Jumper included Two UNIVERSAL MIC PREAMPS-- not found on many machines; 200 ohm / "T" power for Sennheiser / 48 V Phantom Power QSLI Synchronizer board installed for servo control Three tape speeds: 3 3/4 / 7 1/2 / 15ips. RUBY tape guides Timer Clocking Roller (right side) counts minutes FULL TRACK heads. Monoaural Servo feed and takeup torques--nothing gentler for tape transport As a repair engineer and one who has been the New England dealer in the 70s and 80s, I have carefully inspected this machine and replaced missing or defective parts and certify that it is in good operating condition. It is marked up with past owner's engraved ID. There is very little head wear evident. It has been tested both in record and playback, and found to be fully operational.