Schneider f6.8 90mm Large Format Lens.

An excellent lens. Has a 154mm image circle at f16, which is enough coverage for 4x5. Has a Copal #0 shutter, so requires a lens board with a 34.6mm hole. Remarkable condition. Looks to have been hardly used and very well cared for. Full lens specs are here: https://www.schneideroptics.com/info/vintage_lens_data/large_format_lenses/angulon/data/6,8-90mm.html