Flared with single-storey a

Photo is from the late 1980s. The lettering on the boat might have been applied by hand, but it looks as if it was at least based on a typeface.

Here’s the source for the photo.

Comments

similar: Laudatio Medium Italic
(your sample is straight, but the /a/ looks like the single story italic version)

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I found it using Find my Font - http://www.findmyfont.com

I’d considered Laudatio. It’s similar to the sample, but not as curvy. The “s” is particularly different.

I suspect that, if the sample is actually a font, it’s a display font.

Also similar Alonso Flair. It has a single story a in position U+2202 (Copy-Paste: ∂).