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& Mann first offered the "Alberta" during the 1860s.
Today, this very rare treadle can be considered one of the most
desirable English combinations.
A foldback full cover version was also marketed. To make provision
for this, the machine head and accessory box were repositioned on
the table. Consequentially the flywheel was fitted on the opposite
side of the back leg, and the footplate was recast to allow for
the realigned pitman connection - see here.