2x2 curved round brick corner from set 77002

[Rene Rechthaler]

Sounds like a Mixed-Mode Torus Outside  1 x 1.0000 x 0.25 (48\rm04o1000.dat)
0 // Major Radius: 1
0 // Tube(Minor) Radius: 1

and a regular resolution inside tube to fit 11833.dat

do we have a partnumber? and a view of the underside?

Edit: upper part could look like that:
1 16 0 -4 0 20 0 0 0 -20 0 0 0 -20 48\rm04o1000.dat
1 16 0 -24 0 20 0 0 0 1 0 0 0 -20 48\1-4aring.dat
1 16 0 -24 0 20 0 0 0 1 0 0 0 -20 1-4edge.dat
0 BFC INVERTNEXT
1 16 0 -4 0 20 0 0 0 -20 0 0 0 -20 1-4cyli.dat
1 16 20 -4 0 20 0 0 0 0 -20 0 -1 0 1-4disc.dat
1 16 20 -4 0 20 0 0 0 0 -20 0 -1 0 1-4edge.dat
1 16 0 -4 -20 0 1 0 -20 0 0 0 0 -20 1-4disc.dat
1 16 0 -4 -20 0 1 0 -20 0 0 0 0 -20 1-4edge.dat
2 24 0 -4 -20 0 -24 -20
2 24 20 -4 0 20 -24 0