He might have passed for seventy

On the benches, their uncle Kevan knelt with his shoulders slumped, his son beside him. Lancel looks worse than Father. Though only seventeen, he might have passed for seventy; grey-faced, gaunt, with hollow cheeks, sunken eyes, and hair as white and brittle as chalk.

Hi. Does the underlined part mean “if people had asked about his age, he would perhaps have/might have passed for seventy”?

Thank you.