These knives make great carry knives IMO :thumbup: Your W & SB must have been one of the last produced without a cap-lifter, (more correctly 'bottle-opener'), as it was introduced in 1945. The old works where your knife was made still stands in Sheffield. Sadly, cutlery is no longer produced there, but it's still worth a visit if you're ever in the area (I can post pics if you've not already seen them).
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I usually carry my clasp knives in a leather belt pouch with a chain clipped to the bail and to my belt loop. I sometimes carry a whistle on the belt end of the chain. However, I've generally seen them just clipped to the belt, I might carry mine in a similar fashion if I didn't live in a country where the mere sight of a knife wasn't likely to cause people to feint in the street and the police to be called
Maxpedition make a key-ring belt attachment which would work, and for a more traditional look, I'm sure that something similar could be easily made out of a strip of leather and a 'D' ring/'carbine hook' :thumbup: