hmm ;looks like the lapl knives that they used to issue to the SOE (special opperations executive) in WW2. the original ones were made by mappin and webb i believe, a london based jewler to the royal familly no less. i think thats what i read in a large book on the SOE and its wartime opperations.
apperently they used to do things like test fire silenced weapons across the dining hall without telling the dinners, in order to check the effieiency of the silencer at damping the noise!
steve