250 LM boxed set

I finally received a copy of this Japanese 250 LM box. Found it on Yahoo Japan Auction. Price including all fees, shipping to Germany and customs was about EUR 150,-.
But have a look at the "telaio". Do you have ever seen such a low number? FL000-F00100007
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I don't think we ever established the significance of the numbers in relation to actual copies produced.

 

I'd be very surprised if over 4,409 were produced for example- or even half that amount.