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Pennwood Numechron Model #305 with Adler-Royal Cabinet, 1932

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Posted 7 years ago


(393 items)

This is an early Pennwood Numechron, Model #305. The case is wooden, probably Oak with inlays and mouldings. I have only been able to find one Pennwood Numechron similar to it and it is in the National Watch and Clock Museum, the only difference is the case. Both clocks have the same numerals.

The electric motor in this clock still runs, the electrical cord has been replaced, but where it ties into the motor you can see part of the old fiber wrapped cord. There is one cog or gear that needs replacing, it is missing teeth in about three places and locks up the clock when running. A metal Pennwood tag is on the back of the case and on the bottom of the case is a tag from the Addler-Royal Cabinet company. I am in the process of restoring this little oddity and can't wait to get it running.

Prior to this one I have only seen metal and Bakelite Pennwood Numechrons. According to the Patent, Frederick A Greenwalt was the inventor, he filed the patent on 3/10/1933, and received the patent on 2/12/1935. Thanks Chadakoin for the information.

Just recently added the escutcheon for this numechron, when I bought it the escutcheon was missing. Now the clock is complete.


  1. Picking-and-Collecting Picking-and-Collecting, 7 years ago
    These are so cool. I thought digital clocks were a 1970's thing, I had no idea they had been around for so long.
  2. rlwindle rlwindle, 7 years ago
    The Pennwood Co. kept producing numechrons into the 70's then they folded.
  3. Chadakoin Chadakoin, 7 years ago
    The numeral style used on your clock is the rarest and most unusual one Pennwood produced. Unfortunately, the faceplate/escutcheon you're missing is also about the hardest to find. Great clock - good luck with the restoration and thanks for sharing!
  4. rlwindle rlwindle, 7 years ago
    I would like to know what the faceplate/escutcheon for this clock looked like. The other model (last picture in my post) I found out is model #302. I will probably never find one for my numechron, but I will try.
  5. Chadakoin Chadakoin, 7 years ago
    I've seen a photo of one identical to yours. It has the same escutcheon as the #302. Email me and I'll send you the image:
  6. rlwindle rlwindle, 7 years ago
    I sent my Pennwood Numechron off to have a gear ground and replaced along with a good cleaning of the movement. It is clean and it is running on top of my entertainment center. The guy that cleaned it said the electric motor in it would run forever. I am happy to get it running again.
  7. Steve, 7 years ago
    The wooden Pennwood clock I have is identical to this except that it does not have the unusual numerals like this. It has solid numerals. I have never seen another like yours.
  8. rlwindle rlwindle, 7 years ago
    Steve, If you are the guy on Telechrom.con that Dana emailed about my Pennwood numechron he also sent me a picture of yours. I noticed three things that differ from mine and yours. The numerals, the start wheel in the front (yours is thicker) and closer to the minute wheel mine is next to the cabinet, mine has an arrow ebedded in the face plate pointing up. Mr. Sutton, the clockrepairman I took the numechron to said the numechron was not a self starter, you have to push the start wheel up in the direction of the arrow on the front, the numechron will run backwards if you push it down. The escutheon on my numechron would have to also be different from yours in that the escutheon on your's would cover the start wheel. I think my numechron is older than yours because of these differences. Yours probably came along sometime after mine. I think it is a wonderful little oddity, now that it is repaired and running I love it.
  9. Steve, 7 years ago
    Yes, I am the person. I think you are correct. Mine has no arrow and also is a self-starter. I am not sure whether it was originally that way or if someone dropped in a newer movement.

    The only other unusual Pennwood I have is a "Calchron," a clock in the common brown case that displays the month and date instead of the time.
  10. rlwindle rlwindle, 7 years ago
    My numechron's motor is open, there is no cover for it only the cabinet. From looking at other numechrons I noticed most had what I would term a "can" cover over the motor.
    A calchron, how neat is that, is it running?
    I started out collecting only Marble Art Deco Clocks and ventured out into wooden ones. It is habit forming. The numechron I could not resist.
  11. force311999, 7 years ago
    you can find lots of videos on youtube about numechrons just search "numechron"
  12. dave, 6 years ago
    I have a model 900 where can I get it repaired?
    thanks D.
  13. rlwindle rlwindle, 6 years ago
    I do not know where you live, but here in Dallas I took my to B&J Clock Repair on Modella St. Mr. Sutton took it to another guy who ground a new gear for it. Mr. Sutton installed it, cleaned the movement and I got it back. What does a model 900 look like.
  14. Megan, 6 years ago
    I have the picture of the one from the museum you posted. Model 411. Got it from my folks - surely from my dads family. The front cover on mine is broken off, but i have the pieces and wanted it fixed. Seems no one works on these anymore. Love it though and it does still work great.
  15. Chadakoin Chadakoin, 5 years ago
    I was just looking at Pennwood's March 1933 patent for their movement today and noticed that the clock in the patent drawings has the same numerals as yours. It's got to be one of the first ones off the line - pretty cool!
  16. rlwindle rlwindle, 5 years ago
    I just found your post, Wow and thanks a lot, I had to dowload the patent and the drawings. I am still however missing the escutcheon from the front.
  17. lazarusman, 1 year ago
    So, not sure if you were the bidder, but this same model but with escutcheon just sold for $519.00 and is in great shape. I bid $510.00 and that was far more than I wanted to spend, but it's the only unique wooden Pennwood that I can determine I don't own or want to own. Most of my clocks were purchased when they were under the radar. Only one other person bid anywhere the high $200's.

    Oh, well....
  18. lazarusman, 1 year ago
  19. rlwindle rlwindle, 1 year ago
    I saw the 305 on eBay, It had issues, the movement had been replaced, all 305s were not self starting, they had to be primed like mine above, they did not have a second wheel like the one on eBay that sold last night. 305s also had the ghost font like mine above. The 305 became the Pennwood 425 after the patent was approved. The clock on eBay was a marriage between a 305 case and a later movement, saved yourself some money by not winning the bid. BTW I paid $85 for mine on eBay.


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