Hello Roni,
After a few years I'll get back to you for some information.
Finally, according to the extract from the registers, the 2546 is in pink gold, it must have lost its color over time.
I would like to restore it and I am looking for the original dial, could you advise me?
Also, the box bottom of my 2546 is engraved LF, do you have any idea what it can be?
Thank you and see you soon