No, it's NOT the original certificate out of MIA. Please try not to associate Murray Air of YIP with the original National. The original was probably the best airline ever. That includes financially, morally and ethically. Bud Maytag was a genius. Books have been written about this and there is a great youtube video on the original National.
The new National is in name only and I am glad they are not using the Sun King logo like Southeast did albeit slighly different. Have you seen the pay, have you read the terms and conditions at the new so called "National"! ITS ABSOLUTE RUBBISH! They won't last six months in ISP. They are one of the last bottom feeders in the industry.
So, No, they are NOT anything, nor will they ever be, like the original National.
Rant over.