Identifying film accessories

A friend gave me a box of accessories to help her sell them or give them away depending on their worth.
I'm able to identify 90% of them but these few items have proven more difficult to identify.
Could someone help me identify them?

Top Left: Focus screen back for an Agfa plate camera. Top right: some sort of exposure meter; maybe extinction type if there's no visible moving needle. Middle left: Sheet film or plate film holder for Rolleiflex (TLR probably). Middle right: 120 Rollfilm holder for plate camera, probably made by Suydam in Pasadena CA. Bottom left: Pack-film holder for plate camera. Bottom right: Rolleiflex TLR sheet film or glass plate back. I'd combine the appropriate items in a Rolleiflex bundle and a plate camera bundle. The meter is a wild card, unless it's a very early Rolleiflex TLR meter-- think they were an 'add-on' option at first, and were built in later.

Previous post snuck in: Seems it is Rollei stuff.

Middle left: Looks like the pressure plate on a sheet film adapter, a bit like the one for the Mamiya C. May or may not be Mamiya, though.

Bottom right looks like a sheet film back for a TLR. One of the "L' feed models which has a removable back?