The Bell & Howell RINGMASTER 797A is a vintage 8mm film editor/viewer from the mid-20th century. Here are its key features:

Features:

Film Format: Supports 8mm film (standard 8, not Super 8).

Screen: Built-in viewing screen for editing and reviewing film.

Light Source: Uses an internal light bulb to project the film onto the screen.

Manual Operation: Film is advanced manually using hand cranks.

Reel Capacity: Can accommodate small to medium-sized reels.

Editing Functionality: Allows for splicing, cutting, and reviewing film footage.

Construction: Metal and plastic body, sturdy and durable design.

Power Source: Plugs into a standard electrical outlet for operation.

This device was commonly used for home movie editing before digital technology became widespread. Let me know if you need more details!