there is a sticker with stage 2 with a long number with 146 at the end thats the build number on the stage 2 sticker so your number 146 no it aint.... mine ends in 408. there was over 500 made 250 in uk the rest in mainland europe so YES IT IS..... next then any one seen a place that makes a 100mmx 70mm metal plates with a a build number on it then