Disassemble an old Vixen 60mm refractor lens cell?

Early 1970s 60mm f 910 white tube refractor.
I can't figure how the dew shield is attached. Is there a circlip hiding somewhere? It sure doesn't unscrew and it doesn't seem to be a press fit.I would greatly appreciate any info on how these are put together, particularly if you've ever actually taken the objective assembly apart. Thanks

William

I don't knoe this particular scope but i do know that some older scopes had a one piece objective cell dew shield. Can you see the retaining ring for tje objective?

Jon