Zodiac 86 Day Date restoration

[Hirst]

Hello WRT Posters,

My current project is a Zodiac SST Sport watch circa late sixties.  I purchased this on ebay not working.  What a bear of case to open!  I found the mainspring wound up but would not let down.  I could wind the mainspring,  and further the date would not change.  As i disassembled I could see that the mainspring barrel would not move.  After removing the crown and ratchet wheel I noticed a small screw sized part floating around in the movement.  A small post.  So, this post shown below must be just a press fit in a small arm made of thin sheet steel.

The post apparently connects the day mechanism to the date mechanism.  Unfortunately,  the post came loose,  got jammed in the barrel teeth and the watch stopped.  So,  I have the correct mainspring barrel replacement ' I hope ' arriving soon.  I have placed this post in place.  The date and day work perfect.  How should I attach this post so It can't fall out again and destroy my very expensive barrel?  It fits in from the movement side small hole shown and engages another small below.  Shown on the face side image.  I'm afraid if I try to swedge the hole smaller I will distort the part.  There is some friction, but not that I would rely on.  I'm thinking of using a small spot of JB weld.  Is that watchmaking sacrilege?  I believe long side of the post allows the day alone to move when adjusted reverse.  So, how to attach the pin permanently?  Can the barrel teeth be repaired?

Thanks,

Hirst

[JohnR725]

6 hours ago, Hirst said:

Zodiac SST Sport watch

I don't suppose your watch has a model number?

[Hirst]

Hello John,

I’ve got 862 945 on the inside of the caseback and 2232576 on the case at one lug.  86 is marked on the winding rotor.  
 

Thanks

hirst

[JohnR725]

I'm feeling kinda stupid because I noticed in the title you have the number 86 I wonder what that means? Although sometimes it be nice if you put that in the text for us that don't necessarily read the titles. So if that 86 wasn't just some random number am attaching a PDF And you can see if it corresponds To your watch.

zodiac 86.pdf 2149_Zodiac 86.pdf