
hi dale,
Been awhile since we met over the sale of a watch. Have you been tracking me since you know I have a GO?

I believe you just bought a watch from one of the merchants here, no ?.. a Rollie

I tot you were gunning for a JLC Reverso Grande GMT.

Looks like you and I have the exact same taste in SOME watches in terms of brands & models... JLC, GO..

The GO Navigator Perp Calendar was my 2012 grail due to its relatively high cost (for me, that is). Was looking for a mint pre-owned but really hard to find. The ones available in US and Europe were selling at prices close to new and not knowing the service history is scary for a perpetual as its servicing cost is extremely high...(close to 5 figures I've been told)
The perpetual is considered a high complication, below a repeater, tourbillon, sidereal and remontoir...
So at the end I decided to buy it new with a 2 yr warranty.
So far mine has been excellent and trouble free but I rotate my watches daily so its only worn once a fortnight or so. I hope I only need to service it in the next 8-10 years. By that time hopefully I'll be on a financial footing where cost will be bearable. Timekeeping is within COSC altho it is not COSC or DIN certified.
As far as perpetuals are concerned this is one of the most bang for the buck with in-house movement and most visually balanced, hence very easy to read. I was considering between this GO, IWC Pilot Perp and JLC Perp. Note that not all perps are in-house as some are outsourced to 3rd parties like CC whereas some are modules (correct me if my info is wrong)
The IWC's dial looked way too busy and hard to read. To each his own. Some like busy dials. I prefer bauhaus or Zen philosophies.
As much as I love JLCs, its perpetual was way too formal looking in terms of case and dial which means I can't wear it with shorts and polos (my favourite de rigeur dressing on weekends)
Both IWC & JLC perps are 6 figures in cost.
Since I got the GO in March 2012, I've been very happy with it.
By the way the production of this is very low...mine is numbered 00xx although this watch was launched in 2010 and I only got mine in 2012.
Hope the above helps in your decision.