[Junk Item] National PE-251S Strobe With Case A strobe with auto and manual settings, compatible with ISO 100/200/400, guide numbers 9/13. - Brand: National - Model: PE-251S - Functions: Auto, Manual settings - ISO Sensitivity: 100/200/400 - Guide Number: 9/13 - Country of Manufacture: Japan I believe it's over 30 years old. Operation has not been confirmed. Minor dust and dirt will be present as is. I am not knowledgeable, so I may not be able to answer detailed questions. If you read the profile, Instant purchase is OK. Please understand that there may be oversights due to amateur inspection. Long-term home storage. #T Bulk Sale