identifying constructa movement

[east3rn]

Hello, I got this vintage movement from Constructa LTD which is know as a movement manufacturer owned by Mondaine.

Cuuld anyone help me find the name for this movement??

On the train bridge, it says '17 jewels, seventeen, unadjusted, constructa watch LTD, 4433 swiss'

[rogart63]

I am almost sure that is some sort of baumgartner movement.  Check 

Edited May 26, 2018 by rogart63

[noirrac1j]

Its a Ronda.

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&

[rogart63]

15 hours ago, noirrac1j said:

Its a Ronda.

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&

Can't be mistaken that's a Ronda . Worked on them so i should remember. 

[east3rn]

Could you tell me the specific name of it?? The link you provided does not tell me its name.

[noirrac1j]

Good morning (in NYC) @east3rn,

Sorry about that link. The movement is a Ronda 1231. They are sometimes stamped with RAX or RL under the hairspring. They come in a variety of configurations but share many components. Yours seems to have a larger mainplate than the picture, so it might be a variant of 1231. 

J

 

 

 

Edited May 27, 2018 by noirrac1j

[east3rn]

Oh yes it looks very similar. Only the click parts look different between this movement and Ronda1231.

The click for the mainspring is of a unusual form. It is hidden below the rachet wheel.