I'm deep in the middle of research about Josef Pallweber (inventor of the flip clock) and his role in the digital display of time. As many know, he has been credited with the invention of the first pocket watch with time displayed with digits (1883), the first digital display clock and most importantly the first flip clock (see my article and video about this).

For basically forever (in internet existence) people have asserted that the cyclometer was invented by Frederick A. Greenawalt in 1933 (and patented in 1935).

But thanks to clock collector Daniel Harlow from the UK, we have proof that Pallweber invented a cyclometer type looking clock. We know that Pallweber lived from 1858-1921 so even if he invented the clock just before his death at 62 years of age, it would have preceded Greenawalt's clock by 12 years!
I and others have been scouring the internet for any information on this clock. I mean I have been all over German watchmaking publications and numerous patent sites. I can find many of Pallweber's inventions (all that have been previously mentioned in the literature) EXCEPT the clock I'm about to show you. The only other mention of the clock were two letters to the editor in the NAWCC (National Association of Watch and Clock Collectors) bulletins in 1994 and 1995 - I am in the process of getting physical copies of these. But even back then it seems no one could figure this clock out.
You'll notice that there are numbers (which some will claim is a patent number because the stamping says "PALLWEBER PATENT"). But one of the writers in the NAWCC bulletin and the collectors I've been in contact with as pretty positive these are serial numbers (they all have two leading zeros and we've seen digits from 00200s to 00700s).
It seems these may have been prototypes, or that there was an intention to complete the patent process, but that it was never done. I am suspecting that the clocks don't work well and that's why the flip clock was made. So I'm projecting these are pre-1890 clocks.

You are welcome to try to find documentation about these clocks ... but I doubt you'll find anything.
It's an exciting mystery for me and it is another example about how clock history (especially about the digital display of time) is WACKED.
Here's to getting it back on track.
I'll be updating the Pallweber article at some point and getting all the higher quality images up at some point, in addition to making a video. I was just waiting for the NAWCC bulletins to arrive and to see if anyone had any input.
EDIT (3/5/2023): The patent is German Patent No. 48412 (see below for more information).
For basically forever (in internet existence) people have asserted that the cyclometer was invented by Frederick A. Greenawalt in 1933 (and patented in 1935).
But thanks to clock collector Daniel Harlow from the UK, we have proof that Pallweber invented a cyclometer type looking clock. We know that Pallweber lived from 1858-1921 so even if he invented the clock just before his death at 62 years of age, it would have preceded Greenawalt's clock by 12 years!
I and others have been scouring the internet for any information on this clock. I mean I have been all over German watchmaking publications and numerous patent sites. I can find many of Pallweber's inventions (all that have been previously mentioned in the literature) EXCEPT the clock I'm about to show you. The only other mention of the clock were two letters to the editor in the NAWCC (National Association of Watch and Clock Collectors) bulletins in 1994 and 1995 - I am in the process of getting physical copies of these. But even back then it seems no one could figure this clock out.
You'll notice that there are numbers (which some will claim is a patent number because the stamping says "PALLWEBER PATENT"). But one of the writers in the NAWCC bulletin and the collectors I've been in contact with as pretty positive these are serial numbers (they all have two leading zeros and we've seen digits from 00200s to 00700s).
It seems these may have been prototypes, or that there was an intention to complete the patent process, but that it was never done. I am suspecting that the clocks don't work well and that's why the flip clock was made. So I'm projecting these are pre-1890 clocks.
You are welcome to try to find documentation about these clocks ... but I doubt you'll find anything.
It's an exciting mystery for me and it is another example about how clock history (especially about the digital display of time) is WACKED.
Here's to getting it back on track.
I'll be updating the Pallweber article at some point and getting all the higher quality images up at some point, in addition to making a video. I was just waiting for the NAWCC bulletins to arrive and to see if anyone had any input.
EDIT (3/5/2023): The patent is German Patent No. 48412 (see below for more information).
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