The easiest : e-mail.
Less simple but fine anyway : a mail with your complete reference and the model, the pitch and the color (each recorder is sent with a soft casing).
I welcome phone calls.
For new customers, I request a 10% deposit of the price of the recorder.
The delivery time is about 6 to 10 months. In exceptional cases, this may be negociated.
When the recorder is ready, I send you an e-mail, call or write. The recorder is sent upon reception of the balance.