For what it's worth, and to get the ball rolling, it doesn't look Murano to me. It bears a some resemblance to the fenicio style of Fratelli Toso, early 20th Century. The colours are a tad strong, and I don't think it was made using the fenicio method. How have the coloured threads been applied? Are they painted on enamel, or threads of glass picked up on the gather and then marverred in?