I brewed this in November. It came out awesome.
Polotmavé Speciální (Czech festbier)
10 gallons, 1.057 OG, 28 IBUs
11 lbs. Avangard Pilsner
9 lbs. Durst Turbo Vienna
7 lbs. Avangard Munich
10 oz. Weyermann Caravienne
6 oz. Weyermann CaraRed
5 oz. Weyerman CaraFa III
Mash 60 min at 148, add boiling water to 158°F for 15 min
Batch sparge to collect 14 gallons of wort
1 oz. Perle 90 min
1 oz. Spalt 90 min
0.9 oz. Hallertauer Mittelfrueh 30 min
1 oz. Spalt 10 min
1.4 oz. Saaz 5 min
It looks like nice Vienna recipe. Then who is to say the Vienna beer brewed in Czech Republic is not their Amber.
There are multiple ways how this is done on commercial scale in Czech Republic.
1) brew Pilsner, Brew dark. Ferment separately and post fermentation blend both beers.
2) Brew Pilsner wort, Brew Dark wort blend wort together into one fermenter and ferment as single beer.
3) Brew Amber beer as a single recipe beer.
I have 5 BBL brew house and 15 BBL fermenters. I will use method 2) this summer.