This is a Nonpareil banjo with mother of pearl body. Nonpareil instruments (banjos, ukuleles, tenor guitars) were distributed by Perlberg and Halpin of New York from 1926 until the 1940s.

Here are some sales records and asking prices to give you an idea of the market. I was not able to find more than a few for nonpareil so I also looked at 1930s banjos generally. I am basing my valuation on these. Please let me know if I can assist further

Nonpareil banjo, Unsold, Est. $110-$160
https://www.artfoxlive.com/product/2028447.html

Nonpareil banjo, Unsold, asking $475
http://johnalveyturner.co.uk/banjos/tenor-banjos/nonpareil-usa/

Sold for $200, 1920s Nonpareil mandolin
https://www.ebay.com/itm/203446302723?hash=item2f5e583803:g:8EAAAOSwy~pglyX-

Asking prices on reverb for other brands of 1930s banjos were mostly around $400 to $600, with outliers on either end. Here are a few examples:

$425
https://reverb.com/item/38796952-vintage-gretsch-model-a-tenor-banjo-1930s
$450
https://reverb.com/item/33103245-slingerland-may-bell-tenor-banjo-vintage-1930-s-40-s
$600
https://reverb.com/item/38716563-antique-1930s-sterling-tenor-banjo-new-tailpiece-and-bridge-with-nocc-newly-reduced-price
$600
https://bit.ly/3BrNTTd
$3500
https://reverb.com/item/15714011-vega-vox-tenor-4-string-banjo-1930-s-gold-pearloid
$300
https://reverb.com/item/42220666-may-bell-vintage-tenor-banjo-1930-s-nat-brn-with-orig-chipboard-case
$200
https://reverb.com/item/41342574-vintage-1930s-mystery-ukulele-uke-banjolele-banjo-mandolin-slingerland-wm-lange-vega-works-clean