[pianotech] Yamaha M1?

Amadeus Piano amadeuspiano at comcast.net
Thu Sep 17 07:27:11 MDT 2009


Hello all, a customer asked me for a rough value on her piano.  It's a small
Yamaha console piano and I measured it at 41 in. but I'm pretty sure it's a
model M1-looks just like all the M1s I can find pics of online though they
are all shown as 42 in. models.  

 

The only relevant marking I found was on the bottom board and it was a small
handwritten, "M1A7."  At least, I'm pretty sure it's an A, but it could be
an "O" or "0."  The fallboard, knee panel, and sides are marked, "7-10-1."
It has the "Made in Japan" label on the back and another label that has been
torn off.  And the serial number where you'd expect it.  It's otherwise
unmarked-(i.e., no obvious M1 stencil on the plate or elsewhere).

The serial number puts it at 1968 according to Yamaha's site.

It's in really good shape.  It's satin walnut.  Though it hadn't been tuned
in many years with the exception of a few bass notes it was only about -6
cents flat across the board.

The FAC inharmonicity scale according to my Accutuner was pretty smooth:
5.8/6.1/6

It's a nice sounding little piano if a little twangy at the breaks.

 

I'm trying to come up with a ballpark value but I want to make sure I'm not
comparing apples to oranges.  And this is my first M1.  But I'm worried it
might be significantly different than a standard M1.  I want to be sure.

Is this an M1 variant?  Am I reading a model number there or is it something
else?  

 

And if so, anything unusual about it?  

 

I've read that Yamaha made some one-off variants in the past that were in
some cases better quality instruments, in other cases, just slightly
different.

 

Thanks in advance for any help, Gary 

 

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