These green optics (Dichroic mirrors (LEO)*2, harmonic splitter (LEO)*1) for in-air were returned to PSL decicator.
The 2 dichroic mirrors were unpacked in TMSY clean booth once.
I noted this on the box of the mirrors.
(Periscope is used on TMSY optical bench.)

On the other hand, two dichroic mirrors for in-vac (by Sigma-koki) were brought to TMSY booth and were installed in BRTY chamber.