Omega Speedmaster Professional 3861 install micro adjustment clasp upgrade

Omega Speedmaster Professional 3861 install micro adjustment clasp upgrade
Serial No: 117Z017553

[@inaklein5142]

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[@lucabri1]

Is it possible to install it on the 3861?

[@lucabri1]

Is it possible to replace the old clasp with the new one? Is it fully compatible?

[@kostia_mu]

Now. Not possible. Only with this official upgrade kit from omega. You get the same result as newer speedy (only difference if the width of the connection part between the new and old bracelet)