Keiler: I also noticed a mismatch of the gametime in the tutorial: Your grandfather commands you to perform certain moves and as soon as you execute them he comments on it, interrupting the animations in the process. So if there wasn't a patch to the specific bell-code-problem, it might very well still exist. Though I'm not at that part yet.
Thanks for the info, Keiler! Please keep us updated, ok? If this isn't solved, we can try asking GOG to fix it.
EDIT: this guy mentions a fix:
* * *
There are also a few errors in the game (not in every Silver game). If you experience any
troubles during gameplay: eg. error messages or the bell under the sewer that doesn't work,
check out:
http://www.gamekey.com/vp3d/silverfix You'll find some UNOFFICIAL PATCHES there and solutions to for bugs.
* * *
Taken from:
http://www.gamefaqs.com/pc/198645-silver/faqs/2499 But the link he provides doesn't work :(
On Gamefaqs board, someone linked to a save file right after the bell scene. I don't know if it works, but you may check it out:
http://www.gamefaqs.com/boards/198645-silver/59557962