What Calnago 'Master' is this?

[Greve]

I've found a decent frame in my size (64). It's been refurbished and the serial numbers have been covered up. Owner doesnt know the history. Hoping one of the experts here can shed light on the type of master, approx year and tubing used. Many thanks

 

[Rapparee87]

No chain stay bridge, so maybe SLX?

 

[Nob]

Nothing stamped on the fork steerer tube?
Normally a color code is stamped on the rear drive side drop out