I have the Alpagon 23mm with center filter in excellent condition. It's in Copal 0 which was recently serviced by Rodenstock.
Looking to switch to the Alpagon 32 in Copal 0 (preferably SB) as I would like to have a larger image circle for shooting film. Would consider the SK 28 in Alpa mount as well.
If there's anyone interested PM me to discus a possible swap/sale.
Located in Minneapolis, MN USA
Best,
Tyler