Based on the identifying features described and the community response, this appears to be a Linhof Super Technika IV 6×9.

The Super Technika series is a metal-bodied folding rangefinder/view camera, and the 6×9 version matches the compact proportions you noted better than a full large-format model. The angular, beveled front standard is a distinctive Linhof design cue, which is likely what stands out in the poster image.

So while it has the look of a larger technical field camera, the specific camera identified here is a medium-format Linhof Super Technika IV 6×9 rather than a large-format version.