A Rollei projector or viewer — not a camera, but a projection/viewing device.
The Rollei VB Model 2 is a Rollei product — the exact type (camera, accessory, or projector) is uncertain from the catalog entry. Mount unknown.
The Rollei VB Model 2 designation is unclear from the catalog entry alone — Rollei produced cameras, projectors, and accessories. Verify the exact product type from physical inspection or listing description before purchase.
On the used market verify product type before purchase — this catalog entry has insufficient detail to confirm the Rollei VB Model 2 type.