So, the SS-33 II retailed for £80, which I think might have been £10 more than the original model. I think the driver units were the same, but the box was slightly smaller and supposedly better braced. I bought my Mk IIs for £68 from one of those shops in Tottenham Court Road, in the summer of 1986. They were very good speakers for the time, and sold for between half and two-thirds of the price of similar quality speakers with famous hi-fi names on them. Mine replaced a pair of 1974 Wharfedale Linton 2's which they of course totally blew away. Obviously there were many better speakers on the market, (at the time I would have loved to have got my hands on a pair of Wharfedale 708's) but I listened to many, many pairs of cheap stand-mount speakers in the late 80's without finding anything at the £130 price point that I preferred to my Toshibas.
In the early 90's, I bought a secondhand pair of floor-standing B&W 220i from a dealer and sold my Toshibas to a friend.
About 6 or 7 years ago, I bought a pair of what are effectively Mk III SS-33s for very little via a local free ads site. I think someone had found them in a loft. These were called the SS-33M and probably came out in 1988 or 89, I think at the £90 or £100 price point. They use a different and, I think more expensive tweeter than the MkI and II and have a smaller and presumably stiffer box than both earlier versions. They have ended up in my kitchen system, on the end of my Arcam Solo Mini and I listen to them several times a week. I consider SS-33s to be amongst the most unsung heros of the hi-fi world, because we live in a brand-obsessed age...even though all three version were well-reviewed at the time in What Hi-Fi. I don't think most other magazines bothered with them.
All three version were manufactured in Yorkshire by what I think was an established OEM maker called Inghams. I don't know which other speakers they made, and I don't know who made the drive units in these.
The last version, the SS-33M disappeared from the market at some point in the early 90's, I think.
And here endeth the story.