Need a double key for French clock

[LittleWatchShop]

I need a double ended key for this French clock I am fixing.  I have one among my tools, but need to get one for the owner.

I measure 3.5mm and 1.5mm for the two ends.  My research indicates I should look for a 6/000 key.  Is that correct?

[LittleWatchShop]

1 hour ago, LittleWatchShop said:

I need a double ended key for this French clock I am fixing.  I have one among my tools, but need to get one for the owner.

I measure 3.5mm and 1.5mm for the two ends.  My research indicates I should look for a 6/000 key.  Is that correct?

I ordered something close from Amazon.  Should work well enough.

[oldhippy]

This should help you.

https://www.quicktest.co.uk/blogs/jewellery-and-horology/conversions-clock-and-watch-key-winders#section_1