The Brownie Reflex Synchro is often called a "pseudo-TLR" because while it looks like a professional Twin Lens Reflex camera, the top lens is only for a bright viewfinder and is not linked to the bottom taking lens for focusing. It was a very popular consumer camera during the 1940s, known for its large, clear waist-level viewfinder. This "Synchro" version added internal synchronization for flashbulbs, with the two contact pins visible on the side for attaching a flash holder. It produces twelve 4x4cm square images on a roll of 127 film.