Is the older London Call (privilege), different from European Call?

In another discussion the user zer0hedge provides an excerpt from definitions of CALL from a book of 1904 from S.A.Nelson which contains the following: ... and before its maturity if it shows you a profit, you are obliged to trade in the open market and then balance the operation on settlement day" ... This makes it similar to American Call in one aspect, but a bit worse (the "obliged" part), whereas recent reading of definitions of European Call, do not include neither the "before", nor the "obliged" part. If they are different (older London Call vs more recent European Call), how does their price compare to American Call? (I'd assume the "before" should increase the value, but the obliged should have a moderation effect).