Difference between AS 1686 and ST 1686

[BlueHarp]

Hello all of you,

I 've just got a few watches for a very low price, among which was a Solvil and Titus equipped with a movement ST 1686 . I've made some research and I understand that the caliber would be a A. Schilde. But I don't understand the difference between AS 1686 and ST 1686, which is the one I got.

Could anyone explain it to me ? By the way, the movement works very well after cleaning 

Edited April 21 by BlueHarp

[CYCLOPS]

they are the same movement and under the same umbrella, sometimes you will see both company marks stamped on the main plate......

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.opswatches.com/a-complete-guide-to-watch-movement-manufacturers/&ved=2ahUKEwiXydnwsdqFAxVfRTABHaPZDPo4ChAWegQIAhAB&usg=AOvVaw1REXmYw__k9RBspLm7cmDV

 

 

[Waggy]

Maybe a little off-topic, but it still amazes me that most people (and myself before I got into this hobby) don't realise that the movement of their watch was (in most cases) not made by the name on the dial of the watch. This is especially true of many 'fashion' watches which use the cheapest of cheap movements ($4 each) which are completely out of proportion to the overall cost of the watch ($++100s).

Usually the actual manufacturer is stamped somewhere inconspicuous on the movement, usually around the balance, and this is what you need to find so you can locate spare parts or servicing manuals etc.

This is like buying a top of the line Rolls Royce Phantom and learning it has a BMW engine..... oh wait a minute, it does! (6.75-liter, 460-horsepower BMW V12 engine - reference)

[BlueHarp]

Many thanks for your replies!