Go figure that this dumb old fool would hit the wrong key.
My recently acquired and serviced, from Paul Duggan, 9.5 Patek #5000J for your similar:
YG/RG Lange Saxionia or 1815 + your cash; Patek #5120J heads-up or YG/RG Lange 1815 automatic + my cash.
Will sell for $8,000.USD (firm) includes insured shipping CONUS only. Although I much prefer trade and YG.
Several amateur scans and references availible upon request. Thanx for taking your time to read this, Miki