Why the overlap in Model Ms from 93 to 96 period?

[ironcoder]

If I'm understand the clicky site, 42H1292 and 52G9658 were made during this period, ok that we know is based on the location, correct?

But apparently the Blue Label 1391401s were also made during this period. The transition had already been made to Lexmark in early 1993, correct?

So why the overlap between 42H1292/52G9658 and 1391401s?

And what are the 82G2383 models?

[ironcoder]

Haven't checked that but they have a separate category for blue label 1391401s for the 93-96 period.

[ironcoder]

Thanks, that's good info to know.

[ch_123]

If I'm understand the clicky site, 42H1292 and 52G9658 were made during this period, ok that we know is based on the location, correct?

The search button is your friend. The Keyboard Reference or IBM wiki both discuss how these models differed from the 1391401. Nothing to do with location, although after 1996s, pretty much all US Model Ms were 42H's made in Greenock, but they were originally a Lexmark board.

So why the overlap between 42H1292/52G9658 and 1391401s?

Good question. Possibly for different product lines - in terms of cost '1401 > 52G96' > 52G97' > 42H'

Also the reason that webwit pointed out. Clickykeyboards has about 2 1390131s made by Lexmark in 1995. These things would probably be made to order by customers who needed spares. Now why they needed the EXACT model when production models did the same job is entirely beyond me.

And what are the 82G2383 models?

Again, good question. IBM wiki has details, but there was an awful lot of variations amongst these models and the 92G.  Most I have seen however were 52G9658 style.

[ch_123]

Turns out that the 42H was probably only made from 95 onwards. There was about a year of overlap before Lexmark sold off their keyboard division, and the 42Hs were the only tradition Model M that was made. It also seems to me that 1391401s became rare enough after about 93/94.