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Pictures would help. Short answer is host the pictures at another site and link to them here.
The last B4 serial in 1993 was LD bunch of zeros 271. Sometime later the serial prefix changed to AB. Knowing what we know about Guild serial numbers, as well as the unreliability of various listings, I'd hazard a guess that you have an instrument that was given a serial number in late 1993 or early 1994.
Never seen a counterfeit Guild acoustic bass although that doesn't mean much.
I am reasonably certain all B4's were short scale but I am certainly open to evidence to the contrary. There were times in the past when Guild made short and long scale versions of the same bass. Fret count might help determine that, although the best way to measure scale length is to measure the distance between the nut and the 12th fret and double the measurement. If you get 31" or less then I'd say you have a short scale.
For reference: