I guess its possible it was decorated there !! These were sold worldwide as undecorated pieces and finished at final stop !! No telling where some of them wound up !!
You do not have to find the same identical pattern to establish a value !! Most all the plant pots will be approx. the same !! What makes one sell for more than the other is simply because someone likes that color or pattern better than the others !! Its a personal preference !!