Hey Bob,  I saw your posting to the MMD.  I have seen three T-100 roll
cabinets over the years.  In each case, the cabinet matched the piano
either in veneers, marquetry or style.  T-100 pianos were so costly
when new that the owner could afford the custom cabinetry.  One example
was a Steinway grand in an Egyptian revival case, the Vorsetzer and
roll cabinet were all matching marquetry and decoration.

In my own situation, one of my Steinway-Welte grands has a custom
matching bench with a roll compartment inside for the favorite twenty
rolls.  Thus in two of the three examples, Steinway and Sons were
probably involved with the cabinet maker to produce the matching roll
cabinet.

The answer is that, from what I have seen, there is no single style.
One collector in upstate New York paid a cabinet maker to match his
cabinet piano (a keyboardless piano), copying an existing T-100 cabinet
but matching the case style of his piano -- full circle, as it were.

T-98 green rolls are dimensionally the same as Licensee and 88-note
rolls so they would fit in any standard cabinet.

Mark Reinhart
Charles Town, West Virginia