According to The 35/36 Ford Book sold by The Antique Ford Club There were 3 clocks for the glove box door The early 35 was a 34 carryover,the 2nd #40-18540 was electric(high qamp draw)feb -apr 35 two makes were offered Borg or Jaeger Apr-July then came the best known #68-15002-c These clocks are expensive if you find one The most frequent ive seen is the latest one and the $ Avg $750 Ive seen it as high as $1,950 asked. I'd love to have one but my retirement budjet makes me clockless. Good Luck!