Miniature Portrait Date?

I was told you can give a rough estimate of a date by the clothing the person is wearing. Can anyone tell? I was told it's 1800s. It certainly looks like something from that time. But, maybe someone can narrow the window.

It's a beauty, especially the clothing.

 

At a guess, I'd think he was 1850s or a tad later based on the frock coat with the high collar and wide lapels, matching vest and puff tie. But I could be wrong. Would/could you post a photograph of the back?

Debora

 

The chin beard would help date it too if someone knows beards.

 

A "chinstrap." Popular in the 1850s.

Debora

 

He could even be a tad earlier with the lank hair and those side curls. Here's Bulwer-Lytton in the 1840s with similar tie pin and watch chain. His frock coat also has that higher collar.

Debora