The Vermont and Massachusetts Railroad Company was incorporated by the Mass legislature in 1844.
They appear to have gotten off to a slow start, in 1845 the legislature is threatening to terminate their incorporation if they do not complete their road to either Baldwinville or Athol in the next three years
They did in fact complete to Baldwinville by 1848, just in the nick of time ; P
By 1853 the legislature was authorizing them to mortgage the railroad assets to pay down the bonds..not a good sign..
(But typical, most railroads back then overspent their capitol constructing roads, more went broke than made it)
By the 1870's the V&M seems to be mostly road, leasing it's roadway to other operating companies, like the Rutland, and Ma Northern, The relation with Fitchburg is more complex tho, there seems to be a bond exchange, perhaps to help finance the V&M out of trouble.
In 1874 the Fitchburg obtains a 999 year lease on V&M road, at this point, for all practical purposes, the V&M is a land holding company.
By 1913 Fitchburg is operated by B&M , everybody is on the path towards the eventual consolidation of the Boston & Maine...
The complication , for your wrench, is that I can't see that V&M had any actual rolling stock , other than construction equipment...(Which the wrench could, of course, be part of, but that would make it much more rare than general maintainance tools)
PS: Just be be obtuse, there was also the Versailles & Midway RR....(Versailles-Georgetown-Midway, KY)