My new DATEJUST and MILGUASS

[chowkanhung]

Dear Sir / Madam,

I have 4 questions.

1) I have brought a new DATEJUST model (model number 116234, V3352911) a few days ago in France. When I pull the crown to the 1st click position, turning the crown very very SLOWLY to change the date, I have noticed that as the date wheel is going to flip to the next position, a very weak click sound comes first and then followed by a stronger click sound ? Is it normal ? When I do the same testings on i) my wife's new Rolex, which was also brought a few days ago, and ii) my older Rolex DATE model (34mm), they only emit one click sound !

2.) I have also brought a Rolex Milguass (G275410) in France. As I go through the instruction manual, I find that the movement uses the newly invented parachrom as the hair spring. I just want to know whether all Rolex models also use parachrom hair spring since 2008 ?

3.) How many jewels are installed in the DATEJUST model and Milguass model ?

4.) What is the difference between a DATEJUST model and a DATE model ? Someone tells me that the only difference is its size. A larger size (36mm) is the DATEJUST model and the smaller one (34mm) is the DATE model. If this is really the case, why does the lady model, which is of the smallest size, also bears the same name DATEJUST model as the biggest one ?

Thanks for your kind attention and look for your prompt reply.
Best Regards.

[crowncollection]

Question 1 is better for a watchmaker to answer and I am sure a tech expert will.
Question 2. Yes many new models use the parachrome hairspring including the new datejust, sub and day date.
Question 3 datejust 3135 has 31 jewels and the milguass 3130 also has 31 jewels
Question 4 yes the size on a date is smaller and the size you state. The datejust also has many more dial options. The lady datejust has always been around just about as long as a mens I am not sure why it has the same name.