Frankly, I don’t think he’d look that different, although people back then tend to age faster. Not to mention he did spend some time in India, and the subsequent sun exposure could age him (and Evie) faster. Soooo here’s my rough estimation on how 30-year-old Jacob could look like

I think his laugh and worry lines would be the first ones to show. It’d be interesting to know if he changed his hairstyle at this point. o/
~ Signora Paola