Rollei Bay-1 filter set.
Before I got my Rolleicord TLR, I knew I'd want some filters for B&W work and a lens hood. I almost bid for some on eBay. This set actually came with the camera, all in a Rollei branded leather case. Pictured here are a neutral density, orange and yellow, with a Rollinar 2 closeup lens in front. The set. There's also a hood, a UV, a green and a Rollinar 1. The Rollinars are very special. They come in matched pairs, one for the taking lens, the other for the viewing lens, the latter having built in parallax correction... if you know what thay means, you'll realise just how clever those Rollei designers were!