I recently finished a complete overhaul of a Euramca 400 day clock. It is plate 1088 and the pendulum is #61. The book calls for a .0023 spring. After making up the new suspension assembly and ensuring the clock was running strong I started regulating it. I could not get it in range with the .0023 and ended up with a .0025 spring and had to slightly thin it and now I was getting very close to 8 BPM. I set the time and walked away for about an hour. When I came back the clock was about 4 or 5 minutes fast so I checked the BPM again and it was still very, very close to 8 so I reset the time thinking I had maybe set it wrong the first time. As it turns out the clock was consistently running about 5 minutes an hour fast with what seems to be the correct BPM. I had watched the escapement for several minutes and never saw any flutter but I raised the fork slightly anyway with no change. The minute hand is tight enough I am sure there is no slippage. I decided to set the minute hand to 12 then manually operate the anchor pin with my finger for 120 beats and the minute hand moved slightly more than 16 minutes (120 beats should equal exactly 15 minutes). I did this test several times with the exact same result each time. There are no missing teeth on the escape wheel. I have no history of this clock before I tore it down but it was in fair condition when I got it.. The only missing part was the lower suspension block. All the wheels and pinions were in good condition and nothing has been obviously replaced. The only other new part is a new mainspring that I put in. The pendulum motion is excellent as I am getting about 540 degrees rotation. So... before I tear it down again to count teeth and pinion leafs to see if it adds up to 8 BPM does anyone have any other suggestions? I am sure I could simply change the suspension spring again and I could bring it to correct time but that is not really the best solution.