Here we have a 1973 Omega 1600 TC-1 Time Computer LED watch. It is the reference 196.0020 with the 80 micron yellow gold filled case. It is very simple to use, just press the button once to bring up the hours/minutes and hold for the seconds. To adjust the time, the magnet in the clasp is held again the rear to advance the hours or minutes. 
The case is rectangular with the single button to the right-hand side. There is a rectangular red crystal which is etched with the Omega name and logo. The bracelet is well made, with strong links that taper. The bracelet is the reference 1203/211 no.12, which is 20 Micron plated steel. Inside of the clasp is the original magnet for time adjustment. It is a long bracelet which will fit up to a 20.5cm wrist circumference. 
The case back has the brushed finish with the ‘Min’ and ‘Hr.’ sections for adjustment. 
The inside of the case is marked as 80 micron plated stainless steel. It is signed with the Omega name and the Star Watch Case Co logo. It is marked with the reference 196.0020. 
The movement is in good, working condition with new batteries fitted. It has the adapters to fit 357 batteries. It is marked with the Omega logo to the base. The serial number medallion is missing. 
 
The TC1 from Omega represented an important milestone in Omega’s watchmaking history, being its first digital and LED watch. Digital technology has now become common place but when introduced this was revolutionary.
 
The Omegas Time Computer 1 was famously worn by Tele Savalas when playing the TV cop ‘Kojak’, other famous owners included Ringo Star and Mick Jagger.
 
The Omega Time Computer 1 (TC1) was the first LED watch that was publicly available for sale in Europe. Omega did not undertake digital research themselves, instead deciding to sub-contract. The Time Computers were based on Pulsar technology and contain late P2 modules, that could be easily transplanted from cheaper Pulsars and Hamilton watches. The cases were made in America by the Star Watch Case Company, with the magnetic button concept from Pulsar. 
 
The Omega modules are generic Pulsar modules with cosmetic upgrades, meaning it is common to find a Pulsar or Hamilton module in a TC1. Omega modules have the printed logo and gold-plated calibre/serial number plaque. These are fixed with glue and in this case, the medallion is missing. 
 
The watch is modelled on a 17.78cm wrist circumference. It will fit up to a 20.5cm  wrist circumference.
Full condition report below. Please see the images as these compliment and aid the description provided below.
 
Display:
The plastic display cover is original and is in good condition with no wear to the gold tone ‘Omega’ signing or logo. The display is good and bright when the button is pressed.
 
Pusher:
The pusher is original and works correctly to display the time. 
 
Case:
The case is gold plated steel. It is in in strong original condition with the brushed finishing and no wear through the plating. It has some marking associated with age and wear.
 
Case back:
The case back is in strong condition.  It has the brushed finish and retaining ring. The hour and minute text has the black in-fill.
 
Bracelet:
The watch comes on a its original bracelet which is in good original condition. It will fit up to a 20.5cm wrist circumference. The clasp is good with only light marking. The magnet to change the time sits inside the clasp. 
 
Movement:
The movement is an Omega calibre 1600 LED calibre. It is working well. It lacks the gold medallion with serial number. 
 
Case Dimensions:
Case width: 40.5mm
Case width with pusher: 41.6mm 
Case length: 26mm 
Case length lug to lug: 53.7mm 
Case Depth: 14mm
Lug width: 11mm