Here you go
This is a real bitsa.. bits of this and bits of that. http://www.ebay.com.au/itm/Mercury-100-Hp-/190647635608?pt=AU_Boat_Parts_Accessories&hash=item2c637c0e9
The guy says, a 1963 model. I firmly believe that is true for a number of obvious signs relating to the block & leg.. However, I see the wrap around cowl is a 1968 and the front cowl is from the mid 70's. The motor has had a Pacemaker fitted (not THAT type Andrew
) to extend it to a long shaft. The Pacemaker is easily removed to take her back to a short shaft. At some time she's had Trim & tilt fitted which was not available until 1966.
Note 1: The Trim Rams are shown as not fitted in the pics, only the brackets are present.
Note 2: The Merc 1000's were Black in 1962 & 1963. Their blocks were silver.
The black blocks didn't come on to the scene until 1974.
A picture is worth a thousand words.