THESE ARE USED IN THE OPERATION OF ELEVATORS . THESE ALONG WITH OTHERS I HAVE POSTED [ PLEASE CHECK OUT MY STORE ! ] WERE USED WITH OTIS ELEVATORS. THESE ARE NOT MARKED '' OTIS '' BUT YOU CAN SEE [ CHECK THE PHOTOS ] THE I.D. MARKS WRITTEN ON THE BACK OF EACH EPROM THE FLOOR / LEVEL OF THE HOSPITAL THAT THEY WERE INSTALLED / USED FOR. THE DATES ON EACH OF THE 10 ITEMS ARE FROM 1989 , 5/31/89 SO THEY ARE AT A MINIMUM OF 34 YEARS OLD AND I'M SURE OLDER WHEN YOU FIGURE IN THE MANUFACTURED DATE. WHAT YOU SEE IS WHAT YOU GET! THEY ARE BEING SOLD AS VINTAGE ! THANKS FOR SHOPPING ! ANY QUESTIONS? DROP A MESSAGE! MAKE ME AN OFFER!   AND   ****FREE SHIPPING !! IN THE USA!  *** I HAVE OTHER ''OTIS '' ITEMS IN MY STORE ...BUY THEM ALL AND START A MUSEUM ! THE ORIGINAL PACKAGE IS MARKED '' ADVANCED MICRO DEVICES INC. ''    I HAVE A BONUS THAT WILL BE THROWN IN FOR NO CHARGE THERE IS A PHOTO OF IT [ OTIS MOTOR LUCAS LEDEX ] ABOVE I'M NOT SURE OF THE VALUE OR IF IT EVEN WORKS BUT EITHER WAY IT COMES WITH THE PURCHASE! THANKS AGAIN!