I always wondered why most steel bikes just seem to have the smallest area of brazed or welded unterface between the seatstay ends and seat lug, being that there's a lot of weight shifting around there that would flex those joints constantly while riding.
The way some British bike makers wrapped and brazed the seatstay ends around the seat lug seems to make a lot of sense, because of this.
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72 Line Seeker
83 Davidson Signature
84 Peugeot PSV
84 Peugeot PY10FC
84 Gitane Tour de France.
85 Vitus Plus Carbone 7
86 ALAN Record Carbonio
86 Medici Aerodynamic (Project)
88 Pinarello Montello
89 Bottecchia Professional Chorus SL
95 Trek 5500 OCLV (Project)