MSA Safety Inc — Director's Dealing 2012

May 17, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MINE SAFETY APPLIANCES CO (MSA)
CIK: 0000066570
Period of Report: 2012-05-16

Reporting Person: CEDERNA JAMES A (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-16	Common Stock, no par value	M	4854.0000	$21.7100	Acquired	33920.0000	Direct
2012-05-16	Common Stock, no par value	S	2500.0000	$42.8132	Disposed	31420.0000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-16	Non-statutory Stock Option	$21.7100	M	4854.0000	Disposed	2019-05-15	Common Stock, no par value (4854.0000)	Direct

Footnotes

F1: Share price on this transaction ranged from $42.8110 to $42.8170.