I've been trying out German bows and now have two for consideration both stamped Jean-Paul Martin. I gather these are by JonPaul Bows. Both are pernambuco and weigh about 129.5g which is good for me. Also the frog is slightly smaller than the other bows I've tried and really fits my hand nicely. I can't find out much about the company or how good the bows are for the price. These two have engraved silver on them including a cap at the tip. Cost is $500. Any comments ? I'd like to have some idea as to their quality and reputation.