[Been away from my puter for a few days] What's it look like? The ones I used to play on gigs with Packie (who collected so many of them that I sometimes used to call him "Packrat") were all portable folding ones, though we had some smallish floor-standing harmoniums(harmonia?) too which WERE actual harmoniums, one from a church in Yorkshire; but they weren't that big. Another, an organ (also from Yorkshire) was quite ornate and very prettily carved. I also co-owned (pre-Packie) a gigantic American cottage organ with a bunch of stops on it which got "loaned" to friends then living in Portobello Road and never retrieved (maybe it ate them). I'll try to supply further info if I have more details.

PS: If it's the latter, I once had a hilarious Phantom-Of-The-Opera-style photo of me playing it, wearing a very Gothic black velvet dress. It's a scream. But I lost it. Fortunately.