small-luxury-world[Patek]
8725
"the subdials are concentrated into the center a tad too much?"
I know what you are talking about. It´s not 100% perfect like it is, I agree. Maybe that´s why you & me always have to pay "high premium", because we are crazy about (even tiniest) details most people don´t even see or care about 
Quite a lot prospects/customers don´t ask for "100% PLUS" and want something more affordable instead, if at all. Just for example the PP Ref. 5146 ("just" an annual calendar, I know) is a highly desired piece for many and to me something is missing - only a few milimeters are missing 
Other perpetuals for comparision, only:

The second one has the same "perpetual layout" if we talk about dimensions and the third one is only a little bit "better" in that case. The premium you have to pay for "tiny details" is prohibitive for a lot of people, isn´t it? Just talking about dimensions here, nothing else.
Best,
Oliver
Nice review, Oliver!
By: KIH : August 24th, 2014-17:52
This is a nice one for Montblanc, for sure. But I still have reservation - the subdials are concentrated into the center a tad too much? I know the index are intact and that is good as a watch, but still those subdials COULD spread a bit more on the dial,...
Good point, Oliver
By: Tick Talk : August 25th, 2014-07:29
On the cost/benefits account, making new movements to fit the larger case sizes would indeed add to the price. Or affect profitability on the other side of the ledger. Anyway Oliver, you & me must continue the discussion perhaps in January :-)
Good question!
By: small-luxury-world : August 25th, 2014-02:18
My source for that information was a post by our dear Montblanc Moderator mkt33: "The MB 29.15 is an unique movement developed and reserved for Montblanc's use exclusively." Maybe I got something wrong, but I am sure Mike has more details on this. Mike? T...
Well...
By: Goldenlutin : September 1st, 2014-22:52
Well, the Dubois Depraz is the most commonly used perpetual calendar module in the industry. Therefor I don't see a custom module here. I also doubt that the combination of the SW300 (mass production) and this module will be exclusive to Montblanc as the ...
Saving grammes
By: MTF : August 25th, 2014-11:56
I know; the Law of Diminishing Returns with increase in cost. I just had a custom built carbon fibre bicycle (4600 Euros) and the cost premium to save 20g on seat-post or 40g for handlebars was hundreds of Euros! Regards, MTF
Great review
By: ED209 : August 26th, 2014-08:19
Great review Oliver! Very enjoyable review of the Montblanc Mesterstruck Heritage Perpetual Calendar. And good job to MB for producing a relatively affordable perpetual calendar. I have to admit that I agree with some of the comments here about the subdia...