Dalluge was most likely the distributer and not the actual maker. When you compare caps with this logo, the construction can vary widely and with the example below at least, the maker is obviously Pekuro.
The zig zag stitching on the shield maybe the clue to identifying the maker of the TSD cap and it rings a bell with me Tony but my feeble memory isn't that good.
Very nice transportation cap. Hard to find.
An excellent new addition to your collection Tony! I was sorely tempted myself!