: I'd beg to disagree with Rich a bit on his estimate - for me, 72/3
: is far too late for a 166xxx watch. The first Monacos are 157xxx
: and from 1969; there is some disjunct between numbering ranges
: of various models at this time, that later settles down a bit.
: I'd be fairly confident about putting a 166xxx watch in 1970 -
: we've seen manual wind Monacos as low down as the 164xxxs but
: yours will still be quite an early example of the model.

My 1133G has 159xxx.. so that is fairly early then? could be 1969?
gr8, I'd pegged it for 1970 :-)