J-Glass was a John Deacons enterprise (from 1979 to 1983) - later he used "JD" canes. He had co-workers at J-Glass, e.g. Allan Scott.
Your weight is not numbered (98) - the "98" is part of "1981".
This is not usually referred to as "cane signature" but "signature cane" - although cane signature will also be recognised, I guess.
If you send me your mail address (envelope symbol left hand side), I can mail you an image of the "J-1981 signature cane" (which I cannot post here for copyright reasons).
Best regards - Wolf
PS: Don't stay confused - just ask here

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