SAN ROQUE GONZALEZ, Paraguay -- Fatima Olmedo was first to pose naked for the calendar, holding a rolled-up hose in her hands that barely covered her pregnant belly.
Other volunteer firefighters then followed. There's Jorge Leiva, who used a chain saw to cover the area south of his navel and north of his knees. And Daniel Rodriguez who proudly dropped his suspender trousers all the way to his rubber boots.
The caption at the bottom of every photograph reads: "I've stripped for this image because that's how the State keeps us: buck naked."
Month-by-month, they bare it all in photos to raise money and demand resources from the government for their station in this small city on the outskirts of Paraguay's capital.
"We're protesting like this because that's how we're working: We're practically naked," said Fire Chief Alcides Britez, who is pictured in the November page smiling as he climbs up a red fire engine wearing nothing but a helmet.
Other members of the department juggle firefighting duties with jobs as teachers, journalists or plumbers. Some attend nursing school or are finishing a law degree.
"My earnings come from the appreciation and the gratitude of people," volunteer firefighter Silvia Britez said. "That's worth much more than any salary."
The idea for the calendar arose during a photography class taught by Spanish photographer Jose Maria Guerrero.
"I have several students who are volunteer firefighters, and the idea came about when we were discussing the movie 'The Full Monty,'" he said, referring to the British comedy about a group of men who form a strip troupe.
"It's a process that lasted about six months. First, I had to convince them that there's nothing wrong with posing naked for a photo. This is a small town made up of mostly farmers, and not given to sudden changes," Guerrero said.
Since its recent publication, though, the calendar has spread like wildfire in the socially conservative South American nation.
"There are some people who are not in favor of this. ... They're closed-minded. But they're just a few," said Britez. "Most people agreed with this. They liked it. They support us."