Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 1996

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 1994

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 2005

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 1993

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 2012

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 2001

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 2006 40th Annual

(see photos).

Pinback Advertising Button: Oklahoma Steam & Gas Engine Show 1999

(see photos).