Time to start raising temp for diacetyl rest?
 

My (lager) beer is now at 1.025 on it's way to target of 1.013.

It's currently sitting at 50F. Is it time to allow the temp to raise to ~65F for diacetyl rest?

It's getting close. I'd let it drop a little more. As I write this I'm sipping on my latest sample from my lager batch. Pretty good at this point, it'll be a lot better in a month or two. I started my D-rest at 1.015 while there was still yeast in suspension though. It went down to 1.010.

What was the starting OG? I am guessing it's the Maibock in your sig, which would put it in the 1.065ish range? If that is the case then yes I'd let the temp come up for D-rest.

Yes, it's the maibock.

The target OG was 1.065 but I inadvertently added too much top-off water so OG was actually 1.061.

Well maybe then bring it in. I was assuming a 1.050 or so OG.