I went thru this not too long ago and after fiddling with spring bars all too long one rotated and voile it was an old Omega bar with the pin jutting out. I read this whole post only to see recommended to look for them. I had already forgot about them as a possibility and was reading along to see your solution. Sheesh! Looks like I am doomed to recreate the wheel or in this case, fight what may be easily removable spring bars if I only remember to rotate and look for tab. Oh, the watch I did all this on only had one easy one. The other side still took firm yet careful deliberate digging till I distorted it enough to get the bracelet off. That much I do remember.