Need help pricing

[LQ]

Hello Wines.com massive!!

recently i begun helping a friend clear out her mothers house (as she recently passed), we came upon a nice little collection of wines from the late 70's. But there are these 8 bottles of wine that i cant find any info one, hopeing you guys can help me out.

Sichel
1978
Grand Vin De Bordeaux
Graves Superieures
Bonne Terre
Appellation Graves Superieures Controlee
White Bordeaux Wine
Mis en bouteille par
Michel Montadour-Negociant a Bordeaux(Girende)


thats pretty much all it says on the bottle, but what confused me was the Chateau isnt even mentioned. Its obviously french, but that doesnt help me out much.
any and all information will be greatly appreciated.

respect Wines.com massive

LQ