Actually two different toshiba boxes appeared on the market ,both named bombeat 11(also the bb8 appeared twice).
This one is totally rare the bb11a (rt????):
toshiba#-bb11 IBBN 7-15833
Here as example similar shaped sony `s( not aka type),
...just with equivalent key position.
sony#-cfs91 IBBN 7-08806 /aka sony#-cfs-v3 IBBN 7-02011
So far there are around two dozen bombeat suffixed toshiba`s in the base:
rt8700 bombeat x1
rt8160 bombeat2
rt8080 bombeat3
rt8050 bombeat4
rt8024 bombeat6
rt8100 bombeat7
rt8000 bombeat8
rt8900 bombeat8(!)
rt9990 bombeat9
rt8550 bombeat10
rt8800 bombeat11
rt???? bombeat11(!)
rt8290 bombeat12
rt???? bombeat16
rt-s913 bombeat40
rt85 bombeat85
rt9000 bombeat d1
rt170 bombeat dr02
rt9100 bombeat ri
rt-s953 bombeat hr01
rt-sf1 bombeat
rt-sf16 bombeat
(not all from above mentioned models appear always with bombeat suffix).
This one is totally rare the bb11a (rt????):
toshiba#-bb11 IBBN 7-15833
Here as example similar shaped sony `s( not aka type),
...just with equivalent key position.
sony#-cfs91 IBBN 7-08806 /aka sony#-cfs-v3 IBBN 7-02011
So far there are around two dozen bombeat suffixed toshiba`s in the base:
rt8700 bombeat x1
rt8160 bombeat2
rt8080 bombeat3
rt8050 bombeat4
rt8024 bombeat6
rt8100 bombeat7
rt8000 bombeat8
rt8900 bombeat8(!)
rt9990 bombeat9
rt8550 bombeat10
rt8800 bombeat11
rt???? bombeat11(!)
rt8290 bombeat12
rt???? bombeat16
rt-s913 bombeat40
rt85 bombeat85
rt9000 bombeat d1
rt170 bombeat dr02
rt9100 bombeat ri
rt-s953 bombeat hr01
rt-sf1 bombeat
rt-sf16 bombeat
(not all from above mentioned models appear always with bombeat suffix).
Keep up the good work, Jens!!!

bobby, after all these years with all of us scouring every corner of the world how can it be that these rarities remained hidden? 

A BomBeat 14? That must be one rare boombox.