About the RL balance: "Its balance spring was developed by Lange's master watchmakers and is manufactured in-house. It is attached with a patent-pending clamp that, unlike other constructions, does not deform the spring in the stud but instead merely secures it to simplify any future adjustments that may be needed ."
Someone smarter than me will have to explain whether the "patent-pending clamp" is or is not a regulator, and whether the balance wheel is or is not "free sprung". I note that Lange do not use the term in describing the balance wheel, though I'm not sure whether that is an intentional omission.
The RL houses an adjustable mass balance wheel, similar in appearance ot the "Gyromax", while the balance wheel of the 1815 looks to me to have more conventional weights for adjustment. Again, it would be great if someone with sufficient technical knowledge could weigh in (pun intended).
In any event, I wouldn't kick either out of bed! They are both gorgeous to me.
Best,
Jed
This message has been edited by CaliforniaJed on 2009-03-09 15:18:52May this one shot hopefully help influence you!
Cheers
Stephen

I called Wempe in NYC last week and was told that the new 1815 is coming in April and that RG,YG and WG will sell for $18,100. She even thought the price will be negotiable.
For kicks I asked about the Richard Lange PLM and she said it will have a price tag of around $107,000.
I'm in the same boat as you.....I love the idea behind the Richard Lange but have never been a fan of Roman numerals. I've always thought a 40mm 1815 would be perfect. Too bad it hits the market just in time for the Great Depression II.
The PLM is available in both platinum (50 pieces) and rose gold (200 pieces). The quoted US MSRP is $128,600 in platinum and $108,600 in rose gold.
Terry
with screws for adjustment of the balance.
- SJX
This message has been edited by SJX on 2009-03-10 19:33:17Hi,
I am bit late on this thread (!!), but i'd like to report that the accuracy of my 40 mm 1815 (ref. 233.) is BETTER THAN QUARTZ. I have never seen anything like this before. Is it due to the free-sprung large size balance? Honestly i don't know. But i am very pleased and even more surprised by the performance of this watch.
The Arabics are more verstile IMO than the Romans (and also less pretentious, but that's my view only...), the blued hands make a unique contrast on the dial, the heft is very fine, the proportions are unbelievable, the finishing is first class Lange and the understated look feels and looks awsome...
IMO, this is one the most elegant Langes ever.
In a word, i would not trade it for a RG RL, though i like the RL very much.
I have posted a wrist shot on the "Autumn Gathering" thread. I will post more pics (this time, hopefully, quality pics!)
Hope this helps (though your decision is probably taken by now!)
Fred
This message has been edited by passetemps on 2011-11-27 14:26:57