MSA Safety Inc — Director's Dealing 2010

Sep 15, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MINE SAFETY APPLIANCES CO (MSA)
CIK: 0000066570
Period of Report: 2010-09-13

Reporting Person: RYAN JOHN T III (Director, Chairman, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-13	Common Stock, no par value	S	18000.0000	$24.3800	Disposed	1007932.0000	Direct
2010-09-14	Common Stock, no par value	M	100000.0000	$12.1388	Acquired	1107932.0000	Direct
2010-09-14	Common Stock, no par value	S	2500.0000	$24.4016	Disposed	1105432.0000	Direct
2010-09-14	Common Stock, no par value	F	49485.0000	$24.5300	Disposed	1055947.0000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-09-14	Non-statutory Stock Option	$12.1388	M	100000.0000	Disposed	2012-03-11	Common Stock, no par value (100000.0000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, no par value	1521889.0000	Indirect
Common Stock, no par value	354731.0000	Indirect
Common Stock, no par value	160357.0000	Indirect
Common Stock, no par value	474156.0000	Indirect

Footnotes

F1: Shares sold to satisfy tax obligation resulting from option exercise.

F2: Share prices on this transaction ranged from $24.1081 to $24.5900.

F3: Shares held in a trust of which I am a Trustee and in which a member of my immediate family is the beneficiary. I disclaim beneficial ownership of these shares.

F4: I disclaim beneficial ownership of these shares.

F5: Shares held in trusts of which I am not a trustee and in which members of my immediate family are beneficiaries. I disclaim beneficial ownership of these shares.

F6: Shares held in trusts of which I am a trustee and in which I and members of my immediate family are among the beneficiaries.