Okay, I'm stumped. This bugger won't budge. I started looking at it a little more closely a few minutes ago and...is this thing supposed to be square?? I don't remember my departed No. 4 having this...feature, but they aren't really the same. I can't find a clear photo to compare it with; are all No.1's like this and I just need to let the oil penetrate longer, or is this some kind of really odd arsenal staking job from some corner of the world? I'm starting to eye the bastard with visions of a hacksaw blinking in my mind.

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