Grey Metal Lensboard (Speed Graphic?) app 3.5. sq apx 2.5 " Lens Opening AS IS

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Grey Metal Lensboard (Speed Graphic?) app 3.5. sq apx 2.5 " Lens Opening AS IS
These are parts. I have tons of them being listed (or listed) and do not know what all of them fit nor do I have the cameras to test them. Please examine the photos. Items are very reasonable to dirt cheap and I am happy to combine shipping, rather than recycle, I want these to go where they will be used  thanks Mark
Please see my other listings for tons of other items thanks Mark