Very Eavy Very Umble by Uriah Heep mispressed record, read on!


So I recently purchased a copy of this, a pristine German pressing.

But while perusing my collection I found I did indeed already have a copy although it was  a late 70,s reissue on the Mercury label ML8004. It also became obvious I have never played this record...….

Thinking this was a great opportunity to test the sq between this and my mint German pressing I went to cue the Mercury issue up. However it looked odd.
Side 1 has correct Heep label showing the correct 4 tracks and ML8004 cat number but looking at the vinyl I could see only two long tracks?
So dropping the needle on side 1 and..... Absolutely definitely NOT Uriah Heep!
No idea who/what but some trumpet fixated jazz/swing music!
Trying the side at various points revealed it was this on side 1 all the way through and no Heep to be found anywhere!
Now side 2 is indeed the full and correct Uriah Heep side 2 with correct side 2 label.

So it appears I have a mispressing but I can find zero information about this on any internet search I have tried so far.

My questions are;

Has any member here heard of THIS particular mispressing?
Or does any member have a good source of information for mispressed records, like a specialist dealer etc.

Fortunately the German pressing is correct Heep both sides!
128x128uberwaltz
I would be very interested to hear of anybody else who has experienced this type of total mispress on anything?

According to Charlie it is "more common than I think"
According to Elizabeth , nobody is  interested in mispressings and they are worthless.

I find it hard to believe in either of those opinions but tbh I seriously have no clue.

Do NOT misunderstand me here, I am NOT hoping this mispress is going to help me retire...lol.

But still it is difficult to get my mind round that it is a common occurrence and worthless.

Thoughts from anybody who has had or owns a total mispress like this one?
I bought a mispressed copy of Stevie Wonder's Innervisions back in the day. Side 2 had the correct label, but was not Stevie Wonder. Over the years, I would occasionally play it for friends to see if anyone knew who the artist was.
About ten years ago, I again ran across the record and decided to do a search using some of the lyrics. Side two is by Yvonne Fair from an album entitled "The Bitch is Black".
I would liken mispressings to misstamped coins. I thought they would be a rarity.
My thoughts too Carp but apparently not at all.
Which I do find very strange but that part is what it is.
Still not convinced on how common the occurrence is though.