Here is an example of a man's doublet from a style found in Swabia, occupying present day south-western Germany, eastern Switzerland, and  Alsace during the third quarter of the fifteenth century.  Variations in the pattern of this swäbisch doublet include the shape of the yoke of its collar, which could vary from a shallow round shape to more of a pointed triangle, (fig b), and also the shape and attachment of the sleeves.  Generally, it appears to be made with four panels extending to about mid-hip level with the point holes for the hose found near the lower edge of the peplum.  Some, it should be noted, exhibit a seam line separating the peplum from the upper body indicating an eight piece construction for the doublet body.  As the top of the hose rose to the natural waistline with the progression of the century, the bottom hem line of the peplum rose to match it.  Compare with an example from the end of the fifteenth century, the peplum appears as only a thin strip below the waist, full of holes for the purpose of pointing, (fig a).  It should be noted that by century's end there were other significant differences in construction and one should take care not to meld one style with the other.   

The sleeves are of special interest and exhibit a stunning variety in design, (fig c).  They can either be sewn or attached by points to the doublet.  The sleeves can also be completely closed down to the wrist, open only at the elbow, or have an opening reaching from the wrist to almost the armpit.  With the last variation, the opening appears to be held closed at the wrist and at intervals along the opening by points.  In some illustrations an additional slit is cut on the upper sleeve near the sleeve head, (fig. d).  This may be to aid in movement?  The sleeve seam appears to match the side seam of the doublet body in many of the illustrations.  This may represent one possible form of construction.    I offer this pattern as a template for one historically plausible sleeve and doublet reconstruction. 

Images, with the exemption of fig. a and swabian doublet pattern, were taken from Talhoffers Fechtbuch:  Gerichtliche und andere Zweikampfe darstellend, Anno Domini 1467.  They are listed in clockwise order starting from top:  title image, tafel 93; fig. b, tafel 224, 3, 98; fig. c, tafel 239, 100, 48, 82; fig. d, tafel 64, 201,201.  fig. a was taken from The Martyrdom of S. Catherine  B. 120. H. 1883. R. 22. D. 7., ca. 1498.  swäbisch doublet pattern was created by LHF, 2002.