For a long time the Mycenaean Atlas has contained a location for the chamber tomb cemetery at the winery in Achaea called 'Achaea Klauss'. This is C494. However I have never been entirely certain of this position. Many archaeologists have worked at Achaea Klauss but they have all been decidedly cagy about exactly where the chamber tombs were located. For example Papadopoulos says this:
"At the north-west foot of the steep hill Koukoura (east of Eglykas in the neighbourhood of the wine factory Achaea-Klauss and ancient Antheia) is a small field belonging to A.K. Skondras. Kyparisses excavated twelve chamber tombs - variously called "Klauss", "Antheia", or "Skondras" in the PAE reports - and some others were found plundered."
While I'm sure that 'A.K. Skondras' is a fine and honorable person as well as a credit to the Greek nation it doesn't help us to know that these chamber tombs are on his property unless we're able to visit the land registry in Patras.
A map of the area looks like this:
In the center is the large vineyard which lies behind the Klauss Winery (the orange roofs in the upper center left). Pleiades places its marker for the chamber tombs in the center of the field. Topostext puts its marker on the road just to the S of the winery. My long-standing marker (C494) which is in the lower center right of this picture is at the SE corner of the vineyard and in the woods. Which of these, if any, is correct?
I just recently ran across Paschalidis  and while he and his team are just as cagy about the exact location as all other archaeologists he does let the mask slip just a bit and the result is a much more reliable location for Achaea Klauss. In that work (Fig. 5 on p. 8) he publishes the following photograph:
The caption reads "Fig. 5. The vineyard of Achaea Clauss wine factory as it looks from the cemetery site (from southeast)."
Crucially this picture is taken from the chamber tombs. This photo shows the east front of the Klauss complex, most notable are the two towers on the left. I reproduced this view in Google Earth in the next picture:
I drew in approximations for the towers along with a yellow line to join the towers along with the east face of the winery. I then led the red line from the winery face back to the observer. Let's see where that red line ended up.
In this photo from Google Earth the Klauss winery is in the lower center. The red line is the axis along which the previous picture was shot. When we follow that red line from Klauss buildings to the foothills we find the location from which the shot was made. That looks like this:
On the right-hand side of this picture is the location of the Achaea-Klauss chamber tombs. Let's blow up the right side and see where the photograph was taken from.
And right at that point there is a large structure. I don't know that that structure corresponds to the archaeological dig but it is not inconsistent with it.
At any rate I have now moved my point for C494 in the Atlas and I have much more confidence in its new location.
 A long-time bugbear of mine. See this.
Ålin : Ålin, Per. Das Ende der mykenischen Fundstätten auf dem griechischen Festland. Carl Bloms Boktryckeri A.-B., Lund, 1962., 'Koukoura', pg. 63.
Åström : Åström, Paul. ‘Mycenaean Pottery from the Region of Aigion, with a List of Prehistoric Sites in Achaia’, Opuscula Atheniensia, V, pp. 89-110, C.W.K. Gleerup, Lund, 1965., 'Koukoura.', pg. 104.
Giannopoulos : Giannopoulos, T.. Die Letzte Elite der mykenischen Welt: Achaia in mykenischer Zeit und das Phänomen der Kriegerbestattungen im 12.-11. Jahrhundert v. Chr.. Bonn: Habelt. 2008., 'Clauss', pg. 55.
Kaskantiri : Kaskantiri, Sophia ΤΑ ΜΥΚΗΝΑΙΚΑ ΝΕΚΡΟΤΑΦΕΙΑ ΣΤΙΣ ΘΕΣΕΙΣ ΖΩΗΤΑΔΑ ΚΑΙ ΑΓΙΟΣ ΚΩΝΣΤΑΝΤΙΝΟΣ ΣΘΝ ΚΡΗΝΕ ΠΑΤΡΩΝ, ΔΙΔΑΚΤΟΡlΚΗ ΔΙΑΤΡΙΒΗ, ΙΩΑΝΝΙΝΑ 20Ι6 Online here.
Papadopoulos : Papadopoulos, Thanasis J.. Mycenaean Achaea; Part 1: Text. Paul Åströms Förlag, Göteborg, Sweden. 1979. Vol 1., '12. Klauss (Koukoura, Antheia)', pg. 27.
Paschalidis : Paschalidis Constantinos, The Mycenaean Cemetery at Achaia Clauss near Patras: People, material remains and culture in context. Archaeolpress Publishing Ltd. 2019. ISBN: 978-1784919191 This book retails for more than $100.00 but I was able to read it for free on play.google.com. Even if you have to pay for this book the price is still only about $22.00 for this e-books version. Find it here.
Simpson : Simpson, Richard Hope. Mycenaean Greece. Park Ridge, New Jersey: Noyes Press, 1981., 'D 29 Koukoura', pg. 90. Online here.
Simpson and Dickinson : Simpson, Richard Hope and O.T.P.K. Dickinson. A Gazetteer of Aegean Civilization in the Bronze Age, Vol. I: The Mainland and the Islands. Paul Åströms Förlag, Goteborg. 1979., 'B 44 Koukoura (near the Achaia-Klauss factory)', pg. 87. Online here.