Several lamp bases, of Early Series appearance, are recorded with incised numbers that do not fit into the Early Series numbering system but instead are prefixed with the letter 'L' followed by a single digit. They appear to be part of a separate numbering series comprising lamps only. That series must have been short-lived. Examples are rare, only three numbered pieces having been recorded to date, one each of L1, L3 and L5. Presumably the 'L' Series was quickly abandoned in favour of including lamp bases within the overall Early Series numbering.
Do you have an example that could belong to this little-known series? - we'd love to hear from you. Contact us.