Hi!
Interesting discussion. Just that swedish magasine will have an article about sandcasts with photos of my bikes in next magasine as 50 year anniversary. They have also made a reprint of the article you are asking for. I will check later today what I can find and hopfully be able to confirm, what I thought we all had as productionstart, 15 of March 1969.
Bo

Hi.
The first kind you have is used from VIN around 500 and up to around 1500. Your second kind I have seen a couple of times but I am not sure if it is a bad cut of your first kind or if it is another kind we have not spoken about before. What I know is that my #1741/1803 has them on both gauges. Your third kind I use to say is used from around 1500 and up to 12000-13000. I have also seen later bikes with one gauge with your third kind and one with a diecast gear.
Will be interesting to hear what comment the other guys have about this topic.
Kind Regards, Bo from sweden.

Hi!
Some days ago I told the latest rounded rearrims I have seen are on my 22885 and my friends 16xxx. These are the later halfrounded rims. In my opinion the full rounded ended somewhere around 13000.
Please correct me if I am wrong.
Kind Regards, Bo from Sweden.

Hi!
If you look at the restored disc in the topic close to this you can see how my restore looks. It was made with a machine ( I dont know the name in english but translated direct from swedish it might be a rotating magnetoboard with radial working grindstone) to witch I built a extra disc where I can mount the hondadisc to grind the frontside. Backside is easily done as the disc is ”glued” on the magnetoboard. You need to find a machineryshop with that kind of grinder. Unfortunately the company not far from me went bankrobbed so now I do not know where to do it anymore.
Kind regards, Bo from Sweden.

Hi!
Now I have checked, it is #2134/2201.
Bo

Hi.
Pretty many of my sandcasts are imported to Sweden from USA and most of them had Dunlop front tyres. Only one, also US bike, had its original rear tyre. Also a Dunlop, a K87.
Bo

Hi!
Mark has asked me to send Pictures of 300 disc and 341 disc for him to compare. In the attachments you can see a refurbished 300 disc and a normal used nonrefurbished 341 disc. Since I do not find how to attach Pictures in an answer to him direct I choose this way instead. If there are any differences between 300 discs someone else has to tell.
Kind Regards, Bo from Sweden.

Hi!
I have been in USA for hunting last week. In the meantime my friend Randy and I visited Mark Buettner at his company. I want to thank Mark for his hospitallity and showing his bikes. #97/100 is a really nice bike and I am sure his projects also will be.
Thank you Mark, Bo from Sweden