Here are some additional photos that didn’t make it into the book A History of Philadelphia Sandwiches, but are worth viewing:

Pat Olivieri makes a steak
Pat Olivieri (the inventor of the steak) and Cocky Joe Lorenzo (the inventor of the cheesesteak) at the Strawberry Mansion shop, early 1950s (Inquirer)
Milano’s
Milano’s Luncheonette at 11th & Morris, birthplace of the pizza steak (Nick Miglino)
Abner Silver, Frank Olivieri, Joey Vento, Tony Luke Jr. Vonda Bucci, Bill Proetto and Steve Illiescu
The Murderer’s Row of Philly sandwich royalty at the premiere of Ben Daniels’ cheesesteak movie, 2007
Harry Olivieri and Bobby Rydell
This photo was published with Harry Olivieri’s 2006 obituary
pat's ad
Seasons Greetings from Pat’s Steaks, 1976
geno's ad
Great Geno’s ad in the Daily News, 1985
Abner Silver, Frank Olivieri, Joey Vento, Tony Luke Jr. Vonda Bucci, Bill Proetto and Steve Illiescu
1985 Inquirer Photo
billybobs ad
Evidence of billybob’s claim to chicken steak invention (newspapers.com)
Chinks steaks storefront
The old (and thankfully retired) storefront for Chink’s Steaks
Truckers eating steaks
Truck drivers Thomas Calhoun (foreground) and Bob Saxton chomp cheesesteaks on a break in 1980 (Temple Digital Collections)
Gilbey's Gin Ad
Foo Foo Ragan — of mammer jammer fame — was once featured in local ads for Gilbey’s Gin
mom's ad
1966 ad featuring Mom’s cheesesteaks of Bala Cynwyd (Inquirer)