Very Rare! ECHO 500 "ORGAN WATCH" Electronic Wristwatch PIANO KEYS 083 Hong Kong

ITEM DESCRIPTION: Being offered for sale is the very rare, vintage/retro ELECTRONIC "ORGAN WATCH" by "ECHO 500" (marked "083 Made in Hong Kong" at backside), from circa the 1970's or 1980's (best guess) as seen in the pictures/as described in the title. PLEASE SEE BELOW FOR IMPORTANT CONDITION NOTES. Being offered for sale as-found, uncleaned. May require a thorough detailing to bring to its full potential. SATISFACTION GUARANTEED or your money back...no questions asked! CONDITION NOTES: With a brand new battery installed, the screen turned on, displaying "12:00" but we can not get it to set time. The only function that works correctly is the stopwatch. The organ keys look like they are supposed to do something but currently do nothing. Missing the 4 screws that secure the face plate over the battery compartment (see green arrows in 3rd pic). Luckily, it fits perfectly snug enough to hold itself in place. Cosmetically, the watch is in excellent vintage condition with virtually zero wea