Are you sure that it's from the Beocenter and not another project?  I don't recognise it from having dismantled mine (but I have the earlier single-belt tape deck) and I can't see anything similar in the Service Manual's limited exploded parts diagram.

yeah that is a possibility I do have some Penta 1s apart  and (two cats?) but was pretty random as there's a slight indented in the chassis for the tape pulley that in fits perfectly into, put obviously can't go there.

thanks heaps as I always say, if you can put back together with less parts, you're better than the design engineer ?

I'll have look at some manuals,  it does fit here but serving no purpose that I can see. Login to view image

yeah that is a possibility I do have some Penta 1s apart  and (two cats?) but was pretty random as there's a slight indented in the chassis for the tape pulley that in fits perfectly into, put obviously can't go there.

thanks heaps as I always say, if you can put back together with less parts, you're better than the design engineer ?

I'll have look at some manuals,  it does fit here but serving no purpose that I can see. Thanks Guy

Talking through my hat here, but that part *looks* like a mounting shock bumper:  A narrow bolt/machine screw goes down into the whole thing thru the bottom (narrow) hole, tightening a flat metal washer which fits (stops at) the middle hole/shelf.  Having now attached this bumper to the chassis, the top (largest) hole either supports a flat board that is affixed elsewise, or has an inverted screw on it, which slumps into the upper indent/saucer.  Or invert it, if you have a screw fitting into an upper board or chassis part that rests on a base: it's a rubber foot that can be firmly fitted to one item but without squishing the whole thing making it pointless.  The key will be whether you also have an extra screw & washer lying around!?! P.S.  Just looked at your newer pic; not sure I would ever rest a mechanical part onto a (flexy) circuit board, thus agree with you that doesn't look right.