Replacing old "very old" ~ '96 old speedo............can anyone recommend a good "no frills" GPS digital speedo?

I just went through this...
ISO plug/play, self-contained, GPS speedo

Thanks F14 , that's a great help!

Pay attention to what you get. Some of the more expensive (not a typo...the high-end ones) speedometers also need to have the antenna (sold separately) which was up to $150.
The one I bought came complete (with antenna) for about $70.
I have not had it on the water but I installed it and powered it up in my garage/storage and the LCD showed that it found satellites and seemed to work as advertised.

Can't tell from the face of your gauge, but Did you install the Faria ...or auto meter?....

Mine says ECMS on the face. From Ebay Marine Boat Auto GPS Speedometer Speed Meter Gauge 85mm 80MPH 9-32V 316L Bezel
eBay - marinevillage <[email protected]>

You can email the guy above and get different face colors (black, white) and different bezel options (chrome, etc..) This looks the same (with a different name/manufacturer):
Other close ones (be careful about scale (max MPH) and units (MPH vs KPL):
https://www.mrboats.com.au/ecms-spee...ts-black-o~521

https://www.google.com/search?q=Mari...#imgrc=_&vet=1

Lots of choices!....thanks so much for listing them!....my current speedo gauge measures 4" wide...almost 4-1/2" overall with bezel.......haven't pulled it yet, but I assume it has a 3-3/8" hole.

Adapter bezel https://www.cpperformance.com/p-151-...ge-bezels.aspx

I decided to document how I found mine...for posterity sake.