A. Lange & Söhne

Jurry
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Great question

That’s a great question but let’s take one step back: is the one movement indeed more accurate? I don’t mean “as per manufacturer specifications” coz these might be modified for marketing purposes.

Like many others I can’t imagine a brand like ALS manipulating their published specifications for marketing reasons but then again, neither could I imagine Volkswagen, Aud even Mercedes would ever do something like that (and man was I and millions others wrong with that)

So I would start out by reciprocating the question with: “is it more accurate and if so how do we establish that”. Are their reports from u
Independent institutions and are these based on real measurements of a pool big enough to represent the average?

But let’s put that technical academic matter aside for the moment and assume it’s actually correct and let’s try to establish some logical ideas why the one movement is more accurate then the other.

I can think of a few elements that apply to every piece of fine mechanics and not just applicable to watches:

- production part deviation tolerances: the smaller the deviations the less friction the more accurate but also the more expensive to produce

- the materials used inside the movement might have fractional differences

- the material and number of Ruby’s

- material of main spring

- how many different ways can the movement be fine tuned and adjusted might differ

But this is where my horlogical knowhow stops. And this great question is perhaps best replied to by our ALS moderator/connaisseur/addict.

I’m very interested to read his views and those of others because your question might trigger a tsunami of technical expertise rolling downhill. And I for one am eager to learn