X0201 4 2003-12-16 0000066570 MINE SAFETY APPLIANCES CO MSA 0001187321 BIGLER JOSEPH A 121 GAMMA DRIVE RIDC INDUSTRIAL PARK PITTSBURGH 15238 1 Vice President Common 2003-12-15 4 F 0 261 74.65 D 0 D Common 2003-12-15 4 M 0 1000 19.5 A 0 D Common 2003-12-15 4 M 0 3320 19.42 A 0 D Common 2003-12-16 4 S 0 2920 73 D 0 D Common 2003-12-16 4 S 0 300 73.25 D 0 D Common 2003-12-16 4 S 0 100 73.5 D 12645 D Incentive Stock Option 19.4235 2003-12-15 4 M 0 3320 19.42 D 1999-09-09 2009-03-09 Common 3320 0 D Incentive Stock Option 19.5008 2003-12-15 4 M 0 1000 19.5 D 2000-08-28 2010-02-28 Common 1000 4126 D This option was previously reported as an option for 3,080 shares at an exercise price of $20.9375, but was adjusted to reflect the Special Distribution paid on November 24, 2003. This option was previously reported as an option for 4755 shares at an exercise price of $21.02083, but was adjusted to reflect the Special Distribution paid on November 24, 2003. Douglas K. McClaine, Attorney in Fact, Power of Attorney 2003-12-17