This look is mostly a soft, low-contrast black-and-white grade with a slight warm tint. The key clues are that the image avoids true black and true white, so contrast is compressed.

To recreate it digitally:

• Lower contrast by lifting the black point and reducing the white point so shadows and highlights stop short of pure black/white.
• Keep the overall image a bit bright; it sits near a mild high-key look.
• Add a subtle warm tone. One way is to reduce the blue channel in the highlights, which shifts them slightly yellow/cream.

In film terms, a similar result would come from slight overexposure and pull processing to keep shadows full and highlights gentle, then printing on warm-tone paper. Digitally, this is usually simulated in post.

So the recipe is: bright exposure, restrained contrast, lifted shadows, softened whites, and a faint warm cast rather than obvious sepia.