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.
"The firefighters at the San Roque Gonzalez station lack health insurance, which puts us at risk all the time," said Britez, who is also an ambulance driver at the local health center.
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."
Disclaimer: No Business Standard Journalist was involved in creation of this content