When one goes to the doctor, would they not want to know that this was properly trained, certified and qualified to work on their health? The picture below has a number of certificates and diplomas that the staff of Lentz House of Time, LLC have earned.  These industry recognized credentials include a Certified Watchmaker of the 21st Century ( CW21), Certified Master Watchmaker of the 21st Century ( CMW21), WOSTEP's 20 week Refresher Course international certification, NAWCC's year-long Clockmaker Program certification and numerous week-long courses offered by the American Watchmakers-Clockmakers Institute (AWCI) and training sponsored by major companies.