This is either the original Globe design, or some slight modification of it to get nearer the performance of the WA Aplanat designs of the late 1860's onwards.

Gasc et Charconnet describe in their catalogue listing of their modified GLobe that the single elements can be used alone and point out that the front and rear lenses now have slightly different focal lengths. So this may be a way to see how close your Globe is to the original symmetrical Harrison/Schnitzer design by checking the focal lengths of your two cells.