$817! Damn, I thought about paying $400 max on it - somebody sure wanted it. Especially given the last one to come up was on the mower that started this thread, which sold for $850 with the mower attached. It shows that if you get two people that really want something, the sky is the limit with these prices.

Jonesy and Blue, regarding the first style fuel cap, do any of your other model 4's have one?

Made an interesting find today. the following Special is up on ebay at the moment:

[Linked Image]
[Linked Image]

It doesn't look like much, but its serial number is #162,577. This would be the earliest M5S1 I have seen, and combined with Jonesy's model 4 #161,127 (see post 48934), it looks like we may have nailed the serial number at which the Model 5 base was introduced.

I have a model 4 in the 154,000s so we can be pretty sure that side is pretty much confirmed, but a few more M5S1's in the mid 160,000 range would certainly close the case as to when the Model 5 was introduced.

In short, I reckon it would be safe to say that the Model 4 ended and the M5S1 began at around 161,000. Any thoughts?