plate miscasting (was "Fixing Plates"

centipod at mac.com centipod at mac.com
Thu Feb 15 14:03:40 MST 2007


Conrad,

More on this mystery; a very experienced older technician at Steinway  
London told me today (when I mentioned this piano) that when Hamburg  
initially manufactured the M-sized instrument it was known as the  
"small O", and that only later did they designate it as the M. So it  
was labeled the "O 170" instead of "M 170" on our pianos.

This would seem more plausible to me than that the plate was actually  
miscast (and continued to be for a certain amount of time)...so I  
pass it on for what it's worth. Perhaps there are other European  
tuners to whom this is a familiar model they nave encountered.  
Patrick knew immediately what I was describing, so I'm assuming that  
he probably knows whereof he speaks.

The plate on my piano also has a small M towards the back of the  
plate, like yours (mine says M1, though). I don't know whether that  
relates to the model M designation on the NY or not?

Allen Wright, RPT
London, UK



On 9 Feb 2007, at 11:35, Conrad Hoffsommer wrote:

> At 10:52 PM 2/8/2007 +0000, you wrote:
>> While we're on the subject of plates: I showed this on the Piano  
>> Forum list, but thought I'd throw it into the mix here for more  
>> feedback. Below is a Hamburg Model M ca. 1927 in our shop on which  
>> (according to feedback from the Hamburg factory) the plate was  
>> miscast "O 170" instead of (as it should read) "M 170". The  
>> factory had apparently heard of this before. It's 5' 7" or 170 cm,  
>> so most definitely an M.
>>
>> Would the model and length designation would be a separate part of  
>> the pattern in the moulding process? Or is a plate pattern simply  
>> two large plate-sized pieces, top and bottom? (I don't know much  
>> about the mechanics of plate casting). I would assume that a  
>> certain number of plates like this one were produced before the  
>> goof was noticed and the pattern re-carved.
>>
>> I'm curious if anyone has ever seen a plate casting flaw as  
>> fundamental as this on a NY Steinway (or any other model, for that  
>> matter)? Imagine what the piano might be worth if it were a coin  
>> or a stamp  : ) It's hard to imagine there would be a lot of these  
>> kinds of plate anomalies floating around - plates seem like  
>> something so carved in, well... iron!
>>
>> Sorting out the mystery of this contradictory and confusing plate  
>> designation has made me more curious about plate casting in  
>> general. Any observations or insights are welcome.
>>
>> Allen Wright, RPT
>> London, UK
>
> I said:
>> I'll check for the exact configuration tomorrow when I get to  
>> school, but I think we have one of these Hamburgers here.  It has  
>> "O" 170 in the triangle, but i think that it also has an "M" cast  
>> into the plate at the horn.(pointy end)
>>
>> Yes, 170cm is the size.
>> Conrad Hoffsommer
>
>
> The one here is serial #249150. Real close to yours, and here is  
> the designation cast into the plate at the far end.
> Somewhere along the line they _did_ get the "M" on the plate, just  
> not where you can see it w/o opening the lid.(with necessary  
> removal of pictures/music/lamp, etc.)
>
>
> <MVC-014S.JPG>
>
>
> Conrad Hoffsommer - Keyboard Technician
> Luther College, 700 College Dr., Decorah, Iowa 52101-1045
> 1-(563)-387-1204 // Fax 1-(563)-387-1076
>
> - Right now, I'm hoping to live until my age matches my golf score,
> - Until then, I'll have to be content to have my IQ match my handicap.





Allen Wright
6 Clay Court, 219 Long Lane
London SE1 4PB
United Kingdom
020 7378 8265
0780-688-1325 (mobile)




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