Chossy saddlebags were very popular with club cyclists in the 1950/60's especially their medium sized round one. The budget range and most affordable were made from printers felt which looked lke shiney leather. The colours black and grey and very durable and were made of other materials as well ,but I can only recall the felt manufactured type. Only yesterday when purchasing some bikes I was shown a collection of a whole range of these stored in the seller's garage. The only pity was he wouldn't sell me any of them to me ! I don't think Holdsworthy Co. Ltd. had an outlet for this make as they produced and sold their own brand of "Worthy" bags at the time.
Doug. Smith
North Dorset
UK