OMG -- thank you for the info on 131 vs 135. Of all the reference pics I have on my hard drive, I don't have the article I read on this piece that made me think it was 131. "Loss" must be the theme of this brownstone. That said, I am
thoroughly delighted to hear from someone who knows the building and can give me the proper address.
And I'm a wee bit jealous that you lived in this building.

And while I posted it in another thread, I thank you for bumping this old thread because it gives me the opportunity to give the good news here: after SEVEN long years, on July 22, 2012, the Brownstone Matchbox was found!
I was 99% certain that it had been accidentally tossed with some trash, never to be seen again.
Where did I find it? In the top drawer of the jeweler's bench where I work every day. A drawer I've opened and closed about a gazillion times. How did I, after all this time, find it on July 21? I lost something else in that same drawer (only I KNEW it was in the drawer) and ended up pulling the drawer all the way out of the bench.
And there in the far back corner, I saw the Brownstone. I certainly gasped and I damned near wept.
I'm damn near weeping now, just thinking about it. Call me a Melodrama Queen, but quite honestly, with it being lost for seven years, the regret of the Unfinished Brownstone had grown to mythical proportions.
But now the Unfinished Brownstone is safely tucked away with the all the other pieces I had for finishing it -- yes, I've held on to them all this time, refusing to use them in any other project (though there was many an occasion when I was sorely tempted, if only to shut up their vicious taunts about misplacing their counterpart) and I plan to start work on this brownstone in October (after I finish up a couple of other projects).
The anticipation of finishing this piece is quite delicious (and a tidge agonizing).