Emblematic Bulova Accutron Spaceview, this year commemorating its 50th anniversary. 'M4' inscription on back side indicates that its production year was 1964. The skeleton movement and the spools are clearly visible through the crystal. The second hand is white and the white hour and minute hands are lit up. The domed crystal has yellow markers and a yellow Accutron logo. The steel casing has a diameter of 35 mm, the base is made of stainless steel, the slit for the battery can be easily opened with a coin, a new battery has been installed. The wristwatch is in working order and you can hear the buzz of the tuning fork. The adjustment lever can be raised with a thumbnail or a nail. The back of the casing is signed as follows: "BULOVA WATERPROOF INOX BREVETÉ B 37156 M4 ". In perfect working order and keeps accurate time. Genuine leather strap measuring 19 cm excluding the pin buckle. This Spaceview model is one of the most popular collectors' watches amongst the first Accutron watches from the 1960s. Careful and registered shipping with insurance. Happy bidding to all.