I had opportunity to closely examine a Star (Spanish) Rolling Block carbine last summer in Phoenix area. They were available in .30-30 Winchester and .44 Magnum calibers.
Both specimens appeared to be fitted with some sort of light-colored, stained European hardwood, but not walnut. Metal-to-wood fit was only utilitarian...fair to good.
The bluing was deep and dark blue-black, but metal finish stopped at a relatively coarse grade of abrasive. Both receiver and barrel had distinct grinding marks on them. I would rate the polish job as a "7" on a scale of 1-to-10. Rifling and chambers appeared smoothly cut, and the actions were nice and tight, as new rolling blocks guns should be.
For more than $500 I would have expected better quality, but that is the state of the US$ versus the Euro$. They seem to be good quality, but plain utilitarian hunting guns with the rolling block mistique.