Sorry for the delay, been a tad busy...
The Marlin 1889 was Marlin's first solid-top side-ejection rifle and is relatively scarce as only about 55000 were made in the 10 years of production. You are right in that '38 W' would stand for .38 Winchester or .38-40 WCF.
Unfortunately, this is one of those areas were a generalization like 'fine' (even though it's an official NRA grade) just wont cut it. These rifles fluctuate from around $400 to well over $1000 based just on the amount of casehardening left on the receiver, much less any special order features. The 24" barrel was standard, however. That's a 'hands-on' evaluation rifle, or at least several close up well-detailed pictures, to even get in a suitable ballpark.
That said, these are heavily collected and are a SOLID investment provided the original condition is high and the gun is well cared for.
The autonomic nervous system provides for involuntary muscle function - the work of breathing, digestion, and so forth. On some folks, that's a pure waste of ingenuity.