Comments:
I own two
I have a Bespoke Remontoire and the Parallax Tourbillon. They are both different and I love them both. Those are the two I like the most. 
Like their other pieces too but cannot own them all
I understand the limits that may require one -
If you are buying one piece, the selection process is somewhat easier - size, style, available, etc.
From a collecting pov, you add other aspects like does one "build" off the technique or technology of the other (ie Gauthier HMS as the extension of the HM) which can result in wanting to get associated pieces, or completely different vain of the offers.
One Hertz and Parallax are similar but strikingly different; the more current gronefeld models a different vain.
Personally the newer models are to small for me so I started with the available (the minute repeater not being an option) penultimate parallax. But the One Hertz as a complimentary piece came quickly.
From a collecting pov, you add other aspects like does one "build" off the technique or technology of the other (ie Gauthier HMS as the extension of the HM) which can result in wanting to get associated pieces, or completely different vain of the offers.
One Hertz and Parallax are similar but strikingly different; the more current gronefeld models a different vain.
Personally the newer models are to small for me so I started with the available (the minute repeater not being an option) penultimate parallax. But the One Hertz as a complimentary piece came quickly.
Love the question. It’s tough for me to answer, but I will give it a try. I own a 1941 and am enamored with the history surrounding the piece, aesthetics and the movement. However...
the Parallax Tourbillon is an awesome piece! I haven’t seen one in the flesh, but I really like it. So, it would be between these two. Perhaps having some “hands on” time with the Parallax would help with my decision.
availability
The parallax tourbillon and remointore are sold out. I am not sure about the one hertz but they do come up on the used market. I have not seen a parallax tourbillon of recent. I was fortunate because a dealer had one that was sold but the buyer bailed out and they knew I was looking and the rest was history
I chose the 1941 Principia in Rose gold with Roman Numeral Dial.
I love automatic movements so this was an easy choice. With this dial I believe it looks fantastic on any strap choice. I can't wait to try other straps in the future.
If there is a better time only AUTOMATIC watch on the market I want to see it. A close second for me is the Laurent Ferrier Galet which I owned previously but I prefer the more unique movement finishing of the Gronefeld.
I would love to see a Grönefeld Stainless Steel Automatic "sport watch" with depth rating of at least 100 meters, screw down crown, and offered on steel bracelet with quick change to a rubber strap option. This would be my dream watch.
Best
Hank
Excellent choice .
This is one beautiful Principia.
And a Sports watch from the Brothers would be very cool indeed . Who knows 🤷🏻♂️. Time will tell
And a Sports watch from the Brothers would be very cool indeed . Who knows 🤷🏻♂️. Time will tell
beautiful rose gold is personally my favorite iteration of principia [nt]
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Arrrgh you are touching my sweet spot here...
Tim and Bart are incredibly gifted and make fantastic watches.
The One Hertz is definitely stunning but unfortunately not for me for three main reasons: too large for my (very) small wrist, too striking and eye catching for my (maybe too) classic style, and out of reach for my present budget.
But the 1941 Remontoire is definitely one I am hoping to grab one day, most probably with the monochrome guilloche blue KV dial. The front like the back side are simply a feast to the eyes imho. Cross fingers I can make the dream become true one day...
1941 case
Same here. I too have an extra small wrist but the 1941 case fits me like charm.
Hehe I know my friend I tried it several times and the size is perfect
It’s only my pocket size which is small at this moment not the watch 😢
lol looking at your collection anything is possible, perhaps it is just a matter of timing LOL [nt]
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Thank you for all of your insights!
I’ve decided on a One Hertz as my representative of the Grönefeld brothers.