The original "score clock" was this: http://upload.wikimedia.org/wikipedia/commons/d/d8/Maple_Leaf_Gardens_Postcard_1931.jpg
There was also a fairly large clock on the Wood Street side (IIRC) for a long time and a score clock similar to the one shown above from the Chicago Stadium. Both were gone by the mid-1960s I think.
Personally, I still believe the building could have been saved in two forms: 1) Restored to it's original 1931 format -- 13,000 seats, mid-size venue for the city. 2) Employ some creative engineering to keep the Leafs playing in the building.
Of course, this is complete hindsight and given the circumstances in 2010, I think it is the best we could hope for, unfortunately.
Thanks for the original clock pic......I think the digital version of the old "dominion clock" that was there at the end was only in use for 5 or so years so still not sure what all the preservationist hub bub is about on that regard.
As for retaining the building......I think the Melnyk proposal to house the Majors was the only serious proposal to retain it as an arena alone....and he was not willing to agree not to host other events in competition with the vendor so that became a non-starter really.
Pretty sure nothing could have been done to retain it as an NHL rink....the business model of the NHL just moved passed this arena (and all of the other arenas of its vintage in the league for that matter).