This QSL card and a brochure for radio station PPE on 10 MHz at the Observatório Nacional in São Cristóvão near Rio de Janeiro, Brazil arrived today in the mail. Thank you to Ricardo José de Carvalho, Chefe da Divisão do Serviço da Hora for taking the time to sign and send this card. It is the 18th QSL from a time and frequency station in my collection.