What you believe isn't as relevant as
why you believe it. As Micheal points out, "God of the gaps" is the
argument from ignorance fallacy.
As a Christian I believe God made the watch...
The question is why do you believe this? If your lack of knowledge of the natural sciences or the natural science's lack of a highly probable answer leads you to believe this, then this is the fallacy. The problem is, no God can ever be proven to exist that can warrant being the most probable explanation. For something to be an explanation for something, it has to exist (and be demonstrated to exist). One cannot rule out a God, gods, or even magic for any explanation, but one cannot reasonable suggest these explanations without first demonstrated their existence. Don't fear "I don't know" as an answer.
{date-time stamp}Friday, Aug 02, 2019 02:25 PM{/date-time stamp}
I should make clear that reason why is not technically the fallacy; it is the reason GIVEN. Very few of us know why we believe what we do. If you gave the reason "As a Christian I believe God made the watch because science has yet to come up with a better answer," then this would be fallacious. If you simply say "It just seems like the best answer" then there is no direct fallacy.